Home > Check Engine Light Chevrolet Check Engine Light | Top 5 Causes for Each Model

Chevrolet Check Engine Light | Top 5 Causes for Each Model

FIXD Research Team
March 14, 2023

See How To Clear Your Check Engine Light

Want to turn off your check engine light?

Check out our free guide to learn how to clear your light with the touch of a button.

If possible, try to scan your vehicle. You can read your check engine light with or without a scanner and get an exact diagnosis rather than rely only on your powers of deduction.

But, if you are on the side of the road and in a rush, this list of common causes for each Hyundai model should help you narrow down the most likely cause of your issue.

Take a look through the tables below for the most common causes for your Hyundai models’ Check Engine Light. If none of the causes below match the symptoms you’re experiencing or if you want a more in depth explanation of the common causes, go ahead and check out “The 13 Most Common Causes For A Check Engine Light | How To Diagnose Them”.

Let’s dive in.

Chevrolet Astro CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#2	P0101	Engine air filter is very dirty	Replace the engine air filter	Air filter $50-70
		Mass airflow sensor is dirty or broken	Replace the mass airflow sensor	Mass air flow sensor $220-320
		Catalytic converter is damaged or worn	Replace the catalytic converter	Catalytic converter $1720-1780
#3	P0420	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#4	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#5	P0121	Faulty mass airflow sensor	Replace mass airflow sensor	Mass airflow sensor: $230 – $330
#5	P0121	Faulty air filter	Replace air filter	Air filter: $50 – $70

Chevrolet Avalanche CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Avalanche Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0455	Missing, loose, or damaged gas cap	Tighten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#2	P0521	Low oil level	Add oil to your engine	Top off oil: $5 to $10
		Dirty oil	Change oil and oil filter	Oil and filter change: $136 to $149
		Leaking oil pan	Replace oil pan	Oil pan replacement: $654 to $740
		Broken oil pressure sensor	Replace oil pressure sensor	Oil pressure sensor: $123 to $140
#3	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#4	P0449	Missing, loose, or damaged gas cap	Tighten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#5	P0121	Faulty throttle body actuator	Replace throttle body actuator	Throttle body actuator $570-$700
		Faulty throttle body position sensor	Replace throttle body position sensor	Throttle position sensor $170-$230
		Faulty accelerator pedal position sensor	Replace accelerator pedal position sensor	Accelerator pedal position sensor $130-$200
		Damaged wiring	Repair/replace wiring	Wiring repair/replacement $100-$1000

Chevrolet Avalanche 1500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0332	Faulty knock sensor	Replace knock sensor	Knock sensor: $297 – $381
		Faulty knock sensor harness	Replace knock sensor harness	Knock sensor harness: $14 – $66
		Faulty temperature sensor	Tighten or replace gas cap	Temperature sensor: $392 – $427
#2	P0449	Missing, loose, or damaged gas cap	Tighten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#4	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80
#5	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900

Chevrolet AVEO CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0420	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#2	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#4	P2135	Faulty throttle body actuator	Replace throttle body actuator	Throttle body actuator $570-$700
		Faulty throttle body position sensor	Replace throttle body position sensor	Throttle position sensor $170-$230
		Faulty accelerator pedal position sensor	Replace accelerator pedal position sensor	Accelerator pedal position sensor $130-$200
		Damaged wiring	Repair/replace wiring	Wiring repair/replacement $100-$1000
#5	P0340	Faulty camshaft position sensor	Replace camshaft position sensor	Camshaft position sensor $120-$300
		Faulty crankshaft position sensor	Replace crankshaft position sensor	Crankshaft position sensor $190-$250
		Faulty ECM	Replace ECM	ECM $1000-$1200
		Faulty timing chain or belt replacement	Replace timing chain or belt replacement	Timing chain or belt replacement $200-$1000

Chevrolet Blazer CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#2	P0420	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#4	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80
#5	P0440	Damaged charcoal cannister	Replace charcoal cannister	Replace charcoal cannister: $753 – $1000
		Loose or missing gas cap	Replace or tighten gas cap	Replace or tighten gas cap: $0 – $20
		Faulty purge valve	Replace purge valve	Replace purge valve: $109 – $172

Chevrolet C1500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#2	P0304	Spark plug #4 is worn or broken	Replace spark plug #4	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#3	P1345	On newer vehicles: Camshaft or crankshaft position sensor	Replace camshaft or crankshaft position sensor	Camshaft position sensor: $200 – $400
		On older vehicles: Stretched timing chain	Replace stretched timing chain	Crankshaft position sensor: $175 – $230
				Timing chain: $1,624 to $1,879
#4	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80
#5	P0102	Faulty mass airflow sensor	Replace mass airflow sensor	Mass airflow sensor: $230 – $330
#5	P0102	Faulty air filter	Replace air filter	Air filter: $50 – $70

Chevrolet C1500 Suburban CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#2	P0430	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#3	P0140	Faulty oxygen sensor	Replace oxygen sensor	Oxygen sensor: $200 – $300
#3	P0140	Faulty mass airflow sensor	Replace mass airflow sensor	Mass airflow sensor: $230 – $330

Chevrolet C2500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0102	Faulty mass airflow sensor	Replace mass airflow sensor	Mass airflow sensor: $230 – $330
#1	P0102	Faulty air filter	Replace air filter	Air filter: $50 – $70
#2	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#3	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80
#4	P1345	On newer vehicles: Camshaft or crankshaft position sensor	Replace camshaft or crankshaft position sensor	Camshaft position sensor: $200 – $400
		On older vehicles: Stretched timing chain	Replace stretched timing chain	Crankshaft position sensor: $175 – $230
				Timing chain: $1,624 to $1,879

Chevrolet C3500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P1345	On newer vehicles: Camshaft or crankshaft position sensor	Replace camshaft or crankshaft position sensor	Camshaft position sensor: $200 – $400
		On older vehicles: Stretched timing chain	Replace stretched timing chain	Crankshaft position sensor: $175 – $230
				Timing chain: $1,624 to $1,879
#2	P0102	Faulty mass airflow sensor	Replace mass airflow sensor	Mass airflow sensor: $230 – $330
#2	P0102	Faulty air filter	Replace air filter	Air filter: $50 – $70

Chevrolet Camaro CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Camaro Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0420	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#2	P0430	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#3	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#4	P0449	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#5	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80

Chevrolet Caprice CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0441	Damaged charcoal cannister	Replace charcoal cannister	Replace charcoal cannister: $753 – $1000
		Loose or missing gas cap	Replace or tighten gas cap	Replace or tighten gas cap: $0 – $20
		Faulty purge valve	Replace purge valve	Replace purge valve: $109 – $172
#2	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#3	P0400	Stuck EGR valve	Replace the EGR valve	EGR valve: $250 – $350
#3	P0400	Faulty EGR temperature sensor	Replace the EGR temperature sensor	EGR temperatute sensor: $220 – $230
#4	P0305	Spark plug #5 is worn or broken	Replace spark plug #5	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#5	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200

Chevrolet Captiva Sport CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0013	Faulty camshaft sensor	Replace camshaft sensor	Camshaft sensor: $200 – $400
#1	P0013	Faulty oil control valve	Replace oil control valve	Oil control valve: $300 – $600
#2	P0011	Engine oil is low or dirty	Get an oil change	Oil Change $20-$60
		Camshaft variable timing solenoid failure	Replace oil control valve/variable valve timing control solenoid	Oil Control Valve/Variable Valve Timing Control Solenoid $300-$400
		Engine failure	Replace engine	Engine $3000-$4000
#3	P0014	Engine oil is low or dirty	Get an oil change	Oil Change $20-$60
		Camshaft variable timing solenoid failure	Replace oil control valve/variable valve timing control solenoid	Oil Control Valve/Variable Valve Timing Control Solenoid $300-$400
		Engine failure	Replace engine	Engine $3000-$4000
#4	P0420	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#5	P0010	Faulty replace VVT Control Solenoid	Replace VVT Control Solenoid	VVT Control Solenoid $500-$600
		Faulty camshaft position sensor	Replace camshaft position sensor	Camshaft position sensor $120-$300
		Faulty crankshaft position sensor	Replace crankshaft position sensor	Crankshaft position sensor $190-$250
		Faulty timing chain or belt	Replace timing chain or belt	Timing chain or belt replacement $200-$1000

Chevrolet Cavalier CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0440	Damaged charcoal cannister	Replace charcoal cannister	Replace charcoal cannister: $753 – $1000
		Loose or missing gas cap	Replace or tighten gas cap	Replace or tighten gas cap: $0 – $20
		Faulty purge valve	Replace purge valve	Replace purge valve: $109 – $172
#2	P0442	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#3	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#4	P0420	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#5	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900

Chevrolet Classic CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#2	P0420	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#3	P0442	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#4	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190

Chevrolet Cobalt CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Cobalt Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#2	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#3	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#4	P0442	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#5	P0135	Faulty upstream oxygen sesnor	Replace oxygen sensor	Oxygen Sensor $200-$300
		Blown fuse	Replace fuse	Fuse $5
		Damaged or shorted wiring or connections	Replace or repair wiring	Wiring repair/replacement $100-$1000

Chevrolet Colorado CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Colorado Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#2	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#4	P0017	Low oil/dirty oil	Get an oil change or add oil	Engine oil and filter change $20-$60
		Timing chain is stretched	Replace timing chain	Timing chain: $1,624 to $1,879
		Slipped reluctor ring on the crankshaft	Replace reluctor ring	Reluctor ring $200-$600
#5	P0449	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200

Chevrolet Corvette CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#2	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80
#3	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#4	P0410	Blown air injector fuse	Replace air injector fuse	Fuse: $10
		Faulty air pump	Replace air pump	Air Pump: $570-$710
		Faulty air pump relay	Replace air pump relay	Air Pump Relay: $50-$75
#5	P2068	Faulty fuel level sensor	Replace fuel level sensor	Fuel level sensor: $940 – $1080

Chevrolet Cruze CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Cruze Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P1101	Faulty mass airflow sensor	Replace the mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor harness	Replace the mass airflow sensor harness	Replace mass airflow sensor: $230 – $330
		Dirty air filter	Replace air filter	Replace air filter: $20 – $80
#2	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#3	P0299	Faulty turbo or supercharger	Replace turbo or supercharger	Turbo or supercharger: $300 – $3400
#3	P0299	Faulty boost pressure sensor	Replace boost pressure sensor	Boost pressure sensor: $200 – $220
#4	P0420	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#5	P0496	Faulty EVAP Purge Volume Control Valve	Replace EVAP purge volume control valve	EVAP Purge Volume Control Valve $150-$200
		Leaking EVAP system hose	Replace EVAP line	EVAP Line $20-$100
		Faulty EVAP pressure sensor	EVAP pressure sensor	EVAP Pressure Sensor $280-$330

Chevrolet Cruze Limited CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#2	P1101	Faulty mass airflow sensor	Replace the mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor harness	Replace the mass airflow sensor harness	Replace mass airflow sensor: $230 – $330
		Dirty air filter	Replace air filter	Replace air filter: $20 – $80
#3	P0496	Faulty EVAP Purge Volume Control Valve	Replace EVAP purge volume control valve	EVAP Purge Volume Control Valve $150-$200
		Leaking EVAP system hose	Replace EVAP line	EVAP Line $20-$100
		Faulty EVAP pressure sensor	EVAP pressure sensor	EVAP Pressure Sensor $280-$330

#4	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#5	P0299	Faulty turbo or supercharger	Replace turbo or supercharger	Turbo or supercharger: $300 – $3400
#5	P0299	Faulty boost pressure sensor	Replace boost pressure sensor	Boost pressure sensor: $200 – $220

Chevrolet Equinox CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Equinox Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#2	P0014	Engine oil is low or dirty	Get an oil change	Oil Change $20-$60
		Camshaft variable timing solenoid failure	Replace oil control valve/variable valve timing control solenoid	Oil Control Valve/Variable Valve Timing Control Solenoid $300-$400
		Engine failure	Replace engine	Engine $3000-$4000
#3	P0013	Faulty camshaft sensor	Replace camshaft sensor	Camshaft sensor: $200 – $400
#3	P0013	Faulty oil control valve	Replace oil control valve	Oil control valve: $300 – $600
#4	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#5	P0011	Engine oil is low or dirty	Get an oil change	Oil Change $20-$60
		Camshaft variable timing solenoid failure	Replace oil control valve/variable valve timing control solenoid	Oil Control Valve/Variable Valve Timing Control Solenoid $300-$400
		Engine failure	Replace engine	Engine $3000-$4000

Chevrolet Express 1500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#2	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80
#3	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#4	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#5	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)

Chevrolet Express 2500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#2	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#4	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80
#5	P0442	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200

Chevrolet Express 3500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#2	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#4	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200

Chevrolet HHR CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#2	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#4	P0010	Faulty replace VVT Control Solenoid	Replace VVT Control Solenoid	VVT Control Solenoid $500-$600
		Faulty camshaft position sensor	Replace camshaft position sensor	Camshaft position sensor $120-$300
		Faulty crankshaft position sensor	Replace crankshaft position sensor	Crankshaft position sensor $190-$250
		Faulty timing chain or belt	Replace timing chain or belt	Timing chain or belt replacement $200-$1000
#5	P0013	Faulty camshaft sensor	Replace camshaft sensor	Camshaft sensor: $200 – $400
#5	P0013	Faulty oil control valve	Replace oil control valve	Oil control valve: $300 – $600

Chevrolet Impala CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#2	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#3	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#4	P0449	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#5	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200

Chevrolet Impala Limited CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Impala Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#2	P0496	Faulty EVAP Purge Volume Control Valve	Replace EVAP purge volume control valve	EVAP Purge Volume Control Valve $150-$200
		Leaking EVAP system hose	Replace EVAP line	EVAP Line $20-$100
		Faulty EVAP pressure sensor	EVAP pressure sensor	EVAP Pressure Sensor $280-$330
#3	P0442	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#4	P0443	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#5	P0011	Engine oil is low or dirty	Get an oil change	Oil Change $20-$60
		Camshaft variable timing solenoid failure	Replace oil control valve/variable valve timing control solenoid	Oil Control Valve/Variable Valve Timing Control Solenoid $300-$400
		Engine failure	Replace engine	Engine $3000-$4000

Chevrolet K1500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P1345	On newer vehicles: Camshaft or crankshaft position sensor	Replace camshaft or crankshaft position sensor	Camshaft position sensor: $200 – $400
		On older vehicles: Stretched timing chain	Replace stretched timing chain	Crankshaft position sensor: $175 – $230
				Timing chain: $1,624 to $1,879
#2	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#3	P0430	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#4	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)

Chevrolet K1500 Suburban CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0430	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#2	P1345	On newer vehicles: Camshaft or crankshaft position sensor	Replace camshaft or crankshaft position sensor	Camshaft position sensor: $200 – $400
		On older vehicles: Stretched timing chain	Replace stretched timing chain	Crankshaft position sensor: $175 – $230
				Timing chain: $1,624 to $1,879

Chevrolet K3500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0134	Faulty upstream oxygen sensor	Replace oxygen sensor	Oxygen Sensor $200-$300
#1	P0134	Damaged or shorted wiring or connections	Replace or repair wiring	Wiring repair/replacement $100-$1000
#2	P0102	Faulty mass airflow sensor	Replace mass airflow sensor	Mass airflow sensor: $230 – $330
#2	P0102	Faulty air filter	Replace air filter	Air filter: $50 – $70

Chevrolet Lumina CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0440	Damaged charcoal cannister	Replace charcoal cannister	Replace charcoal cannister: $753 – $1000
		Loose or missing gas cap	Replace or tighten gas cap	Replace or tighten gas cap: $0 – $20
		Faulty purge valve	Replace purge valve	Replace purge valve: $109 – $172
#2	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#3	P0401	Faulty EGR valve	Replace EGR valve	EGR valve: $332 to $413
#3	P0401	Engine vacuum leak	Fix vacuum leak	Vacuum leak: $90 to $125
#4	P0446	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200

Chevrolet Malibu CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Malibu Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#2	P0013	Faulty camshaft sensor	Replace camshaft sensor	Camshaft sensor: $200 – $400
#2	P0013	Faulty oil control valve	Replace oil control valve	Oil control valve: $300 – $600
#3	P0010	Faulty replace VVT Control Solenoid	Replace VVT Control Solenoid	VVT Control Solenoid $500-$600
		Faulty camshaft position sensor	Replace camshaft position sensor	Camshaft position sensor $120-$300
		Faulty crankshaft position sensor	Replace crankshaft position sensor	Crankshaft position sensor $190-$250
		Faulty timing chain or belt	Replace timing chain or belt	Timing chain or belt replacement $200-$1000
#4	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#5	P1101	Faulty mass airflow sensor	Replace the mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor harness	Replace the mass airflow sensor harness	Replace mass airflow sensor: $230 – $330
		Dirty air filter	Replace air filter	Replace air filter: $20 – $80

Chevrolet Malibu Limited CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0741	Faulty Torque Converter Lockup Solenoid	Replace Torque Converter Lockup Solenoid	Torque Converter Lockup Solenoid: $110 – $300
		Faulty Engine Coolant Temperature Sensor	Replace Engine Coolant Temperature Sensor	Engine Coolant Temperature Sensor: $392 – $427
		Faulty Torque Converter Clutch	Faulty Torque Converter Clutch	Torque Converter Clutch: $600 – $1200
#2	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)

Chevrolet Monte Carlo CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#2	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200

#4	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#5	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900

Chevrolet Prizm CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#2	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#3	P0446	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#4	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#5	P0440	Damaged charcoal cannister	Replace charcoal cannister	Replace charcoal cannister: $753 – $1000
		Loose or missing gas cap	Replace or tighten gas cap	Replace or tighten gas cap: $0 – $20
		Faulty purge valve	Replace purge valve	Replace purge valve: $109 – $172

Chevrolet S10 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#2	P0440	Damaged charcoal cannister	Replace charcoal cannister	Replace charcoal cannister: $753 – $1000
		Loose or missing gas cap	Replace or tighten gas cap	Replace or tighten gas cap: $0 – $20
		Faulty purge valve	Replace purge valve	Replace purge valve: $109 – $172
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#4	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#5	P0410	Blown air injector fuse	Replace air injector fuse	Fuse: $10
		Faulty air pump	Replace air pump	Air Pump: $570-$710
		Faulty air pump relay	Replace air pump relay	Air Pump Relay: $50-$75

Chevrolet Silverado 1500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Silverado 1500 Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0449	Missing, loose, or damaged gas cap	Tighten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#2	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#4	P0332	Faulty knock sensor	Replace knock sensor	Knock sensor: $297 – $381
		Faulty knock sensor harness	Replace knock sensor harness	Knock sensor harness: $14 – $66
		Faulty temperature sensor	Replace temperature sensor	Temperature sensor: $392 – $427
#5	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200

Chevrolet Silverado 1500 Classic CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0449	Missing, loose, or damaged gas cap	Tighten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#2	P0332	Faulty knock sensor	Replace knock sensor	Knock sensor: $297 – $381
		Faulty knock sensor harness	Replace knock sensor harness	Knock sensor harness: $14 – $66
		Faulty temperature sensor	Replace temperature sensor	Temperature sensor: $392 – $427
#3	P0455	Missing, loose, or damaged gas cap	Tighten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#4	P0442	Missing, loose, or damaged gas cap	Tighten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200

Chevrolet Silverado 1500 HD CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#2	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#3	P0101	Engine air filter is very dirty	Replace the engine air filter	Air filter $50-70
		Mass airflow sensor is dirty or broken	Replace the mass airflow sensor	Mass air flow sensor $220-320
		Catalytic converter is damaged or worn	Replace the catalytic converter	Catalytic converter $1720-1780
#4	P0332	Faulty knock sensor	Replace knock sensor	Knock sensor: $297 – $381
		Faulty knock sensor harness	Replace knock sensor harness	Knock sensor harness: $14 – $66
		Faulty temperature sensor	Replace temperature sensor	Temperature sensor: $392 – $427

Chevrolet Silverado 2500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#2	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#3	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80
#4	P0332	Faulty knock sensor	Replace knock sensor	Knock sensor: $297 – $381
		Faulty knock sensor harness	Replace knock sensor harness	Knock sensor harness: $14 – $66
		Faulty temperature sensor	Replace temperature sensor	Temperature sensor: $392 – $427

Chevrolet Silverado 2500 HD CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0101	Engine air filter is very dirty	Replace the engine air filter	Air filter $50-70
		Mass airflow sensor is dirty or broken	Replace the mass airflow sensor	Mass air flow sensor $220-320
		Catalytic converter is damaged or worn	Replace the catalytic converter	Catalytic converter $1720-1780
#2	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#3	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#4	P0332	Faulty knock sensor	Replace knock sensor	Knock sensor: $297 – $381
		Faulty knock sensor harness	Replace knock sensor harness	Knock sensor harness: $14 – $66
		Faulty temperature sensor	Replace temperature sensor	Temperature sensor: $392 – $427
#5	P0700	Defective shift solenoids	Replace shift solenoids	Shift solenoid: $200 – $500
		Defective Valve Body	Replace valve Body	Valve Body: $300 – $1000
		Faulty Transmission	Replace Transmission	Transmission: $1800 – $3400

Chevrolet Silverado 2500 HD Classic CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#2	P0430	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#3	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#4	P0674	Glow plug failure	Replace glow plug	Glow plug: $230 – $290

Chevrolet Silverado 3500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0050	Faulty upstream oxygen sensor	Replace upstream oxygen sensor	Oxygen sensor: $275 – $500
#2	P0700	Defective shift solenoids	Replace shift solenoids	Shift solenoid: $200 – $500
		Defective Valve Body	Replace valve Body	Valve Body: $300 – $1000
		Faulty Transmission	Replace Transmission	Transmission: $1800 – $3400
#3	P0101	Engine air filter is very dirty	Replace the engine air filter	Air filter $50-70
		Mass airflow sensor is dirty or broken	Replace the mass airflow sensor	Mass air flow sensor $220-320
		Catalytic converter is damaged or worn	Replace the catalytic converter	Catalytic converter $1720-1780

Chevrolet Silverado 3500 Classic CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#2	P0678	Glow plug failure	Replace glow plug	Glow plug: $230 – $290

Chevrolet Silverado 3500 HD CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#2	P0674	Glow plug failure	Replace glow plug	Glow plug: $230 – $290

Chevrolet Sonic CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Sonic Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#2	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#3	P0496	Faulty EVAP Purge Volume Control Valve	Replace EVAP purge volume control valve	EVAP Purge Volume Control Valve $150-$200
		Leaking EVAP system hose	Replace EVAP line	EVAP Line $20-$100
		Faulty EVAP pressure sensor	EVAP pressure sensor	EVAP Pressure Sensor $280-$330
#4	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#5	P0597	Faulty thermostat	Replace the thermostat	Thermostat: $140 – $300

Chevrolet Spark CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0597	Faulty thermostat	Replace the thermostat	Thermostat: $140 – $300
#2	P0700	Defective shift solenoids	Replace shift solenoids	Shift solenoid: $200 – $500
		Defective Valve Body	Replace valve Body	Valve Body: $300 – $1000
		Faulty Transmission	Replace Transmission	Transmission: $1800 – $3400
#3	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#4	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200

Chevrolet SSR CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0443	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#2	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200

Chevrolet Suburban CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0430	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#2	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#3	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Spark plug wires: $180-$240
#4	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200

Chevrolet Suburban 1500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Suburban Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#2	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#3	P0449	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#4	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#5	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)

Chevrolet Suburban 2500 CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P2135	Faulty throttle body actuator	Replace throttle body actuator	Throttle body actuator $570-$700
		Faulty throttle body position sensor	Replace throttle body position sensor	Throttle position sensor $170-$230
		Faulty accelerator pedal position sensor	Replace accelerator pedal position sensor	Accelerator pedal position sensor $130-$200
		Damaged wiring	Repair/replace wiring	Wiring repair/replacement $100-$1000
#2	P0449	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#3	P0332	Faulty knock sensor	Replace knock sensor	Knock sensor: $297 – $381
		Faulty knock sensor harness	Replace knock sensor harness	Knock sensor harness: $14 – $66
		Faulty temperature sensor	Replace temperature sensor	Temperature sensor: $392 – $427
#4	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900

Chevrolet Tahoe CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Tahoe Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Spark plug wires: $180-$240
#2	P0449	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#3	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#4	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#5	P0174	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak: $100 – $200
		Clogged fuel injectors	Clean fuel injectors	Clean fuel injectors: $50 – $80

Chevrolet Tracker CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0400	Stuck EGR valve	Replace the EGR valve	EGR valve: $250 – $350
#1	P0400	Faulty EGR temperature sensor	Replace the EGR temperature sensor	EGR temperatute sensor: $220 – $230
#2	P0442	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#3	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#4	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200

Chevrolet Trailblazer CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Trailblazer Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#2	P0014	Engine oil is low or dirty	Get an oil change	Oil Change $20-$60
		Camshaft variable timing solenoid failure	Replace oil control valve/variable valve timing control solenoid	Oil Control Valve/Variable Valve Timing Control Solenoid $300-$400
		Engine failure	Replace engine	Engine $3000-$4000
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#4	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#5	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200

Chevrolet Trailblazer EXT CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0014	Engine oil is low or dirty	Get an oil change	Oil Change $20-$60
		Camshaft variable timing solenoid failure	Replace oil control valve/variable valve timing control solenoid	Oil Control Valve/Variable Valve Timing Control Solenoid $300-$400
		Engine failure	Replace engine	Engine $3000-$4000
#2	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#3	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#4	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900
#5	P0526	Engine cooling fan control module failure	Replace engine cooling fan control module failure	Engine cooling fan control module: $800 – $900
		Engine cooling fan failure	Replace engine cooling fan failure	Engine cooling fan: $100 – $400
		Engine cooling fan relay failure	Replace cooling fan relay failure	Cooling fan relay: $70 – $80

Chevrolet Traverse CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

For more details visit our Chevrolet Traverse Check Engine Light article.

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0008	Faulty timing chain	Replace timing chain	Timing chain $600-$1200
#1	P0008	Faulty reluctor ring	Replace reluctor ring	Reluctor ring $200-$600
#2	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#3	P0017	Low oil/dirty oil	Get an oil change or add oil	Engine oil and filter change $20-$60
		Timing chain is stretched	Replace timing chain	Timing chain: $1,624 to $1,879
		Slipped reluctor ring on the crankshaft	Replace reluctor ring	Reluctor ring $200-$600

#4	P0430	Damaged or worn out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair
#5	P0496	Faulty EVAP Purge Volume Control Valve	Replace EVAP purge volume control valve	EVAP Purge Volume Control Valve $150-$200
		Leaking EVAP system hose	Replace EVAP line	EVAP Line $20-$100
		Faulty EVAP pressure sensor	EVAP pressure sensor	EVAP Pressure Sensor $280-$330

Chevrolet Trax CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#2	P1101	Faulty mass airflow sensor	Replace the mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor harness	Replace the mass airflow sensor harness	Replace mass airflow sensor: $230 – $330
		Dirty air filter	Replace air filter	Replace air filter: $20 – $80
#3	P0496	Faulty EVAP Purge Volume Control Valve	Replace EVAP purge volume control valve	EVAP Purge Volume Control Valve $150-$200
		Leaking EVAP system hose	Replace EVAP line	EVAP Line $20-$100
		Faulty EVAP pressure sensor	EVAP pressure sensor	EVAP Pressure Sensor $280-$330
#4	P0420	Damaged or worn-out catalytic converter	Replace catalytic converter	Replace catalytic converter: $400-$2400
		Broken O2 sensor	Replace downstream O2 sensor	Oxygen sensor replacement: $275-$500
		Exhaust leak	Seal exhaust leak	Exhaust leak: $100-$200 (if welded to repair)
#5	P0299	Faulty turbo or supercharger	Replace turbo or supercharger	Turbo or supercharger: $300 – $3400
#5	P0299	Faulty boost pressure sensor	Replace boost pressure sensor	Boost pressure sensor: $200 – $220

Chevrolet Uplander CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0449	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#2	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#3	P0455	Missing, loose, or damaged gas cap	TIghten or replace gas cap	Missing or damaged gas cap: $0-$20
		Leak in EVAP line	Fix leap in EVAP line	EVAP line: $20-$100
		EVAP vent control valve is damaged or stuck	Replace EVAP vent control valve	EVAP vent control valve: $150-$200
		EVAP purge volume control valve is damaged or stuck	Replace EVAP purge volume control valve	Purge volume control valve: $150-$200
#4	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190

Chevrolet Venture CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P0135	Faulty upstream oxygen sensor	Replace oxygen sensor	Oxygen Sensor $200-$300
		Blown fuse	Replace fuse	Fuse $5
		Damaged or shorted wiring or connections	Replace or repair wiring	Wiring repair/replacement $100-$1000
#2	P0440	Damaged charcoal cannister	Replace charcoal cannister	Replace charcoal cannister: $753 – $1000
		Loose or missing gas cap	Replace or tighten gas cap	Replace or tighten gas cap: $0 – $20
		Faulty purge valve	Replace purge valve	Replace purge valve: $109 – $172
#3	P0171	Dirty mass airflow sensor	Clean mass airflow sensor	Clean mass airflow sensor: $20 – $100
		Faulty mass airflow sensor	Replace mass airflow sensor	Replace mass airflow sensor: $230 – $330
		Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasket	Seal vacuum leak	Vacuum leak $100 – $200
#4	P0128	Faulty engine coolant thermostat	Replace engine coolant thermostat	Replace engine coolant thermostat: $40 – $190
#5	P0300	Spark plug is worn or broken	Replace spark plugs	Spark plugs: $66-$250
		Ignition coils are broken	Replace ignition coils	Ignition Coils: $230-$640 (some cars require Intake manifold removal)
		Spark plug wires are worn	Replace spark plug wires	Spark plug wires: $180-$240
		Fuel injectors are broken	Replace fuel injectors	Fuel injectors: $1500-$1900

Chevrolet Volt CEL – Causes, Diagnostic Codes, Potential Repairs, & Repair Costs

	DTC Codes	Most Common Causes	Repair	Repair Cost
#1	P1FFF	Faulty coolant level sensor	Replace coolant level sensor	Coolant level sensor: $330 – $350
#2	P0401	Faulty EGR valve	Replace EGR valve	EGR valve: $332 to $413
#2	P0401	Engine vacuum leak	Fix vacuum leak	Vacuum leak: $90 to $125

FAQs – Chevrolet Check Engine Light

How long can you drive with the check engine light?

Depending on how serious your Check Engine Light is, you may not want to drive. According to FIXD’s data on Check Engine Light causes, 40% of all Check Engine Lights are serious. Before you continue driving, pull over and figure out why it’s on.

If you have a Flashing Check Engine Light, the issue is likely serious. Misfires, a common cause of a flashing light, can cause severe and expensive engine damage. Unburnt fuel can Chevrolet it into your exhaust and destroy your catalytic converter, which can cost over $1000 to replace. If your light is flashing, you probably want to get a tow, it will be cheaper in the long run.

If you have a Solid Check Engine Light or one that goes on and off seemingly at random or only under certain conditions (like hard acceleration), you may not need to get a tow and can probably drive a few days without a problem. But, you should pull over to check for common problems just to Chevrolet sure the light is not an early warning sign of a larger issue like your car overheating, leaking fluids, or not pumping coolant or oil. Just get to a safe spot and check for the most common cause first: A loose gas cap. If that’s all it is, tighten it up and be on your way, the light should reset itself. If not, check out: What to Do When Your Check Engine Light Comes on. Checking for symptoms like rough idling, loud exhaust, or other warning lights will help you rule out a more serious problem.

Is it safe to drive your Chevrolet with the check engine light on?

It’s usually safe to drive your car for a few days with your Check Engine Light on as long as it’s not flashing. Some problems like engine misfires, which generally cause your Check Engine Light to flash, can make your car harder to control and can even start a fire in your car if left untreated for long enough.

Although most times it’s safe to drive with your Check Engine Light on, you should always find out why it’s on ASAP. If something is seriously wrong with your car, the longer you drive, the higher the risk of costly repairs. According to FIXD’s data on Check Engine Light causes, 40% of all Check Engine Lights are serious.

What Does the Check Engine Light Mean?

When your Check Engine Light is on it means your car has identified a problem with the engine or transmission. There are over 1000 problems that can trigger a check engine light. Some are minor like a loose gas cap. Some, like an engine misfire, are more serious and can cause engine failure and/or damage.

The only way to know for sure what’s causing the check engine light is to diagnose it yourself or have a mechanic diagnose it. If you’d like to save some money; learning how to scan your car’s computer with a code reader isn’t hard and doing so will show you what system in your car is broken and you can narrow it down to likely repairs from there. This can help you decide if you can fix it or at the very least keep you from being overcharged at the mechanic. You can buy a small scanner like FIXD that fits in a glovebox, pocket, or purse if you want a clear answer on the severity of your light before you start driving again. Or check out: Where To Get Your CEL Checked if you need to find somewhere to get it checked fast.

What Does the Check Engine Light Look Like?

The check engine light is typically a yellow, orange, or red light in the shape of an engine on your car’s dashboard. Depending on the car, it might include the words “Check” or “Service Engine” inside or next to the engine symbol. The light might be solid or flashing depending on the cause of the check engine light.

FIXD Research Team

At FIXD, our mission is to make car ownership as simple, easy, and affordable as possible. Our research team utilizes the latest automotive data and insights to create tools and resources that help drivers get peace of mind and save money over the life of their car.

Clear your check engine light in seconds

The FIXD Sensor and free app tells you why your check engine light is on in easy-to-understand terms and lets you clear it with the touch of a button.

LEARN MORE AND SAVE 67%

We’re here to help you simplify car care and save, so this post may contain affiliate links to help you do just that. If you click on a link and take action, we may earn a commission. However, the analysis and opinions expressed are our own.

Topics

About the Author

Advertiser Disclosure

1. Year

2. Make

3. Model

4. Trim

5. Fuel Type

Great news! FIXD is compatible with your vehicle.

Instantly read and clear your check engine light