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Chevrolet Check Engine Light | Top 5 Causes for Each Model

TABLE OF CONTENTS

Diagnose and clear your check engine light!

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”.

When you are ready to read your code, check out the FIXD sensor or, our other resources:

How to Read a Check Engine Light With or Without a Scanner

 

Where To Get Your Check Engine Light Codes Checked For Free

 

Let’s dive in.

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#2P0101Engine air filter is very dirtyReplace the engine air filterAir filter $50-70
Mass airflow sensor is dirty or brokenReplace the mass airflow sensorMass air flow sensor $220-320
Catalytic converter is damaged or wornReplace the catalytic converterCatalytic converter $1720-1780
#3P0420Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#4P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#5P0121Faulty mass airflow sensorReplace mass airflow sensorMass airflow sensor: $230 – $330
Faulty air filterReplace air filterAir 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 RepairRepair Cost
#1P0455Missing, loose, or damaged gas capTighten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#2P0521Low oil levelAdd oil to your engineTop off oil: $5 to $10
Dirty oilChange oil and oil filterOil and filter change: $136 to $149
Leaking oil panReplace oil panOil pan replacement: $654 to $740
Broken oil pressure sensorReplace oil pressure sensorOil pressure sensor: $123 to $140
#3P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#4P0449Missing, loose, or damaged gas capTighten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#5P0121Faulty throttle body actuatorReplace throttle body actuatorThrottle body actuator $570-$700
Faulty throttle body position sensorReplace throttle body position sensorThrottle position sensor $170-$230
Faulty accelerator pedal position sensorReplace accelerator pedal position sensorAccelerator pedal position sensor $130-$200
Damaged wiringRepair/replace wiringWiring repair/replacement $100-$1000

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0332Faulty knock sensorReplace knock sensorKnock sensor: $297 – $381
Faulty knock sensor harnessReplace knock sensor harnessKnock sensor harness: $14 – $66
Faulty temperature sensorTighten or replace gas capTemperature sensor: $392 – $427
#2P0449Missing, loose, or damaged gas capTighten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#4P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80
#5P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0420Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#2P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#4P2135Faulty throttle body actuatorReplace throttle body actuatorThrottle body actuator $570-$700
Faulty throttle body position sensorReplace throttle body position sensorThrottle position sensor $170-$230
Faulty accelerator pedal position sensorReplace accelerator pedal position sensorAccelerator pedal position sensor $130-$200
Damaged wiringRepair/replace wiringWiring repair/replacement $100-$1000
#5P0340Faulty camshaft position sensorReplace camshaft position sensorCamshaft position sensor $120-$300
Faulty crankshaft position sensorReplace crankshaft position sensorCrankshaft position sensor $190-$250
Faulty ECMReplace ECMECM $1000-$1200
Faulty timing chain or belt replacementReplace timing chain or belt replacementTiming chain or belt replacement $200-$1000

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#2P0420Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#4P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80
#5P0440Damaged charcoal cannisterReplace charcoal cannisterReplace charcoal cannister: $753 – $1000
Loose or missing gas capReplace or tighten gas capReplace or tighten gas cap: $0 – $20
Faulty purge valveReplace purge valveReplace purge valve: $109 – $172

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#2P0304Spark plug #4 is worn or brokenReplace spark plug #4 Spark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#3P1345On newer vehicles: Camshaft or crankshaft position sensorReplace camshaft or crankshaft position sensorCamshaft position sensor: $200 – $400
On older vehicles: Stretched timing chainReplace stretched timing chainCrankshaft position sensor: $175 – $230
  Timing chain: $1,624 to $1,879
#4P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80
#5P0102Faulty mass airflow sensorReplace mass airflow sensorMass airflow sensor: $230 – $330
Faulty air filterReplace air filterAir filter: $50 – $70

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#2P0430Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#3P0140Faulty oxygen sensorReplace oxygen sensorOxygen sensor: $200 – $300
Faulty mass airflow sensorReplace mass airflow sensorMass airflow sensor: $230 – $330

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0102Faulty mass airflow sensorReplace mass airflow sensorMass airflow sensor: $230 – $330
Faulty air filterReplace air filterAir filter: $50 – $70
#2P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#3P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80
#4P1345On newer vehicles: Camshaft or crankshaft position sensorReplace camshaft or crankshaft position sensorCamshaft position sensor: $200 – $400
On older vehicles: Stretched timing chainReplace stretched timing chainCrankshaft 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 RepairRepair Cost
#1P1345On newer vehicles: Camshaft or crankshaft position sensorReplace camshaft or crankshaft position sensorCamshaft position sensor: $200 – $400
On older vehicles: Stretched timing chainReplace stretched timing chainCrankshaft position sensor: $175 – $230
  Timing chain: $1,624 to $1,879
#2P0102Faulty mass airflow sensorReplace mass airflow sensorMass airflow sensor: $230 – $330
Faulty air filterReplace air filterAir 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 RepairRepair Cost
#1P0420Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#2P0430Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#3P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#4P0449Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#5P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0441Damaged charcoal cannisterReplace charcoal cannisterReplace charcoal cannister: $753 – $1000
Loose or missing gas capReplace or tighten gas capReplace or tighten gas cap: $0 – $20
Faulty purge valveReplace purge valveReplace purge valve: $109 – $172
#2P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#3P0400Stuck EGR valveReplace the EGR valveEGR valve: $250 – $350
Faulty EGR temperature sensorReplace the EGR temperature sensorEGR temperatute sensor: $220 – $230
#4P0305Spark plug #5 is worn or brokenReplace spark plug #5 Spark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#5P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0013Faulty camshaft sensorReplace camshaft sensorCamshaft sensor: $200 – $400
Faulty oil control valveReplace oil control valveOil control valve: $300 – $600
#2P0011Engine oil is low or dirtyGet an oil changeOil Change $20-$60
Camshaft variable timing solenoid failureReplace oil control valve/variable valve timing control solenoidOil Control Valve/Variable Valve Timing Control Solenoid $300-$400
Engine failureReplace engineEngine $3000-$4000
#3P0014Engine oil is low or dirtyGet an oil changeOil Change $20-$60
Camshaft variable timing solenoid failureReplace oil control valve/variable valve timing control solenoidOil Control Valve/Variable Valve Timing Control Solenoid $300-$400
Engine failureReplace engineEngine $3000-$4000
#4P0420Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#5P0010Faulty replace VVT Control SolenoidReplace VVT Control SolenoidVVT Control Solenoid $500-$600
Faulty camshaft position sensorReplace camshaft position sensorCamshaft position sensor $120-$300
Faulty crankshaft position sensorReplace crankshaft position sensorCrankshaft position sensor $190-$250
Faulty timing chain or beltReplace timing chain or beltTiming chain or belt replacement $200-$1000

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0440Damaged charcoal cannisterReplace charcoal cannisterReplace charcoal cannister: $753 – $1000
Loose or missing gas capReplace or tighten gas capReplace or tighten gas cap: $0 – $20
Faulty purge valveReplace purge valveReplace purge valve: $109 – $172
#2P0442Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#3P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#4P0420Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#5P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#2P0420Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#3P0442Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#4P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace 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 RepairRepair Cost
#1P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#2P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#3P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#4P0442Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#5P0135Faulty upstream oxygen sesnorReplace oxygen sensorOxygen Sensor $200-$300
Blown fuseReplace fuseFuse $5
Damaged or shorted wiring or connectionsReplace or repair wiringWiring 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 RepairRepair Cost
#1P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#2P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#4P0017Low oil/dirty oilGet an oil change or add oilEngine oil and filter change $20-$60
Timing chain is stretchedReplace timing chainTiming chain: $1,624 to $1,879
Slipped reluctor ring on the crankshaftReplace reluctor ringReluctor ring $200-$600
#5P0449Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#2P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80
#3P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#4P0410Blown air injector fuseReplace air injector fuseFuse: $10
Faulty air pumpReplace air pumpAir Pump: $570-$710
Faulty air pump relayReplace air pump relayAir Pump Relay: $50-$75
#5P2068Faulty fuel level sensorReplace fuel level sensorFuel 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 RepairRepair Cost
#1P1101Faulty mass airflow sensorReplace the mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensor harnessReplace the mass airflow sensor harnessReplace mass airflow sensor: $230 – $330
Dirty air filterReplace air filterReplace air filter: $20 – $80
#2P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#3P0299Faulty turbo or superchargerReplace turbo or superchargerTurbo or supercharger: $300 – $3400
Faulty boost pressure sensorReplace boost pressure sensorBoost pressure sensor: $200 – $220
#4P0420Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#5P0496Faulty EVAP Purge Volume Control ValveReplace EVAP purge volume control valveEVAP Purge Volume Control Valve $150-$200
Leaking EVAP system hoseReplace EVAP line EVAP Line $20-$100
Faulty EVAP pressure sensorEVAP pressure sensorEVAP Pressure Sensor $280-$330

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#2P1101Faulty mass airflow sensorReplace the mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensor harnessReplace the mass airflow sensor harnessReplace mass airflow sensor: $230 – $330
Dirty air filterReplace air filterReplace air filter: $20 – $80
#3P0496Faulty EVAP Purge Volume Control ValveReplace EVAP purge volume control valveEVAP Purge Volume Control Valve $150-$200
Leaking EVAP system hoseReplace EVAP line EVAP Line $20-$100
Faulty EVAP pressure sensorEVAP pressure sensorEVAP Pressure Sensor $280-$330
   
#4P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#5P0299Faulty turbo or superchargerReplace turbo or superchargerTurbo or supercharger: $300 – $3400
Faulty boost pressure sensorReplace boost pressure sensorBoost 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 RepairRepair Cost
#1P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#2P0014Engine oil is low or dirtyGet an oil changeOil Change $20-$60
Camshaft variable timing solenoid failureReplace oil control valve/variable valve timing control solenoidOil Control Valve/Variable Valve Timing Control Solenoid $300-$400
Engine failureReplace engineEngine $3000-$4000
#3P0013Faulty camshaft sensorReplace camshaft sensorCamshaft sensor: $200 – $400
Faulty oil control valveReplace oil control valveOil control valve: $300 – $600
#4P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#5P0011Engine oil is low or dirtyGet an oil changeOil Change $20-$60
Camshaft variable timing solenoid failureReplace oil control valve/variable valve timing control solenoidOil Control Valve/Variable Valve Timing Control Solenoid $300-$400
Engine failureReplace engineEngine $3000-$4000

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#2P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80
#3P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#4P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#5P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#2P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#4P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80
#5P0442Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#2P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#4P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#2P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#4P0010Faulty replace VVT Control SolenoidReplace VVT Control SolenoidVVT Control Solenoid $500-$600
Faulty camshaft position sensorReplace camshaft position sensorCamshaft position sensor $120-$300
Faulty crankshaft position sensorReplace crankshaft position sensorCrankshaft position sensor $190-$250
Faulty timing chain or beltReplace timing chain or beltTiming chain or belt replacement $200-$1000
#5P0013Faulty camshaft sensorReplace camshaft sensorCamshaft sensor: $200 – $400
Faulty oil control valveReplace oil control valveOil control valve: $300 – $600

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#2P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#3P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#4P0449Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#5P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum 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 RepairRepair Cost
#1P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#2P0496Faulty EVAP Purge Volume Control ValveReplace EVAP purge volume control valveEVAP Purge Volume Control Valve $150-$200
Leaking EVAP system hoseReplace EVAP line EVAP Line $20-$100
Faulty EVAP pressure sensorEVAP pressure sensorEVAP Pressure Sensor $280-$330
#3P0442Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#4P0443Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#5P0011Engine oil is low or dirtyGet an oil changeOil Change $20-$60
Camshaft variable timing solenoid failureReplace oil control valve/variable valve timing control solenoidOil Control Valve/Variable Valve Timing Control Solenoid $300-$400
Engine failureReplace engineEngine $3000-$4000

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P1345On newer vehicles: Camshaft or crankshaft position sensorReplace camshaft or crankshaft position sensorCamshaft position sensor: $200 – $400
On older vehicles: Stretched timing chainReplace stretched timing chainCrankshaft position sensor: $175 – $230
  Timing chain: $1,624 to $1,879
#2P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#3P0430Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#4P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0430Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#2P1345On newer vehicles: Camshaft or crankshaft position sensorReplace camshaft or crankshaft position sensorCamshaft position sensor: $200 – $400
On older vehicles: Stretched timing chainReplace stretched timing chainCrankshaft 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 RepairRepair Cost
#1P0134Faulty upstream oxygen sensorReplace oxygen sensorOxygen Sensor $200-$300
Damaged or shorted wiring or connectionsReplace or repair wiringWiring repair/replacement $100-$1000
#2P0102Faulty mass airflow sensorReplace mass airflow sensorMass airflow sensor: $230 – $330
Faulty air filterReplace air filterAir filter: $50 – $70

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0440Damaged charcoal cannisterReplace charcoal cannisterReplace charcoal cannister: $753 – $1000
Loose or missing gas capReplace or tighten gas capReplace or tighten gas cap: $0 – $20
Faulty purge valveReplace purge valveReplace purge valve: $109 – $172
#2P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#3P0401Faulty EGR valveReplace EGR valveEGR valve: $332 to $413
Engine vacuum leakFix vacuum leakVacuum leak: $90 to $125
#4P0446Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge 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 RepairRepair Cost
#1P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#2P0013Faulty camshaft sensorReplace camshaft sensorCamshaft sensor: $200 – $400
Faulty oil control valveReplace oil control valveOil control valve: $300 – $600
#3P0010Faulty replace VVT Control SolenoidReplace VVT Control SolenoidVVT Control Solenoid $500-$600
Faulty camshaft position sensorReplace camshaft position sensorCamshaft position sensor $120-$300
Faulty crankshaft position sensorReplace crankshaft position sensorCrankshaft position sensor $190-$250
Faulty timing chain or beltReplace timing chain or beltTiming chain or belt replacement $200-$1000
#4P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#5P1101Faulty mass airflow sensorReplace the mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensor harnessReplace the mass airflow sensor harnessReplace mass airflow sensor: $230 – $330
Dirty air filterReplace air filterReplace air filter: $20 – $80

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0741Faulty Torque Converter Lockup SolenoidReplace Torque Converter Lockup SolenoidTorque Converter Lockup Solenoid: $110 – $300
Faulty Engine Coolant Temperature SensorReplace Engine Coolant Temperature SensorEngine Coolant Temperature Sensor: $392 – $427
Faulty Torque Converter ClutchFaulty Torque Converter ClutchTorque Converter Clutch: $600 – $1200
#2P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#2P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
   
#4P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#5P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#2P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#3P0446Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#4P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#5P0440Damaged charcoal cannisterReplace charcoal cannisterReplace charcoal cannister: $753 – $1000
Loose or missing gas capReplace or tighten gas capReplace or tighten gas cap: $0 – $20
Faulty purge valveReplace purge valveReplace purge valve: $109 – $172

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#2P0440Damaged charcoal cannisterReplace charcoal cannisterReplace charcoal cannister: $753 – $1000
Loose or missing gas capReplace or tighten gas capReplace or tighten gas cap: $0 – $20
Faulty purge valveReplace purge valveReplace purge valve: $109 – $172
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#4P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#5P0410Blown air injector fuseReplace air injector fuseFuse: $10
Faulty air pumpReplace air pumpAir Pump: $570-$710
Faulty air pump relayReplace air pump relayAir 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 RepairRepair Cost
#1P0449Missing, loose, or damaged gas capTighten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#2P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#4P0332Faulty knock sensorReplace knock sensorKnock sensor: $297 – $381
Faulty knock sensor harnessReplace knock sensor harnessKnock sensor harness: $14 – $66
Faulty temperature sensorReplace temperature sensorTemperature sensor: $392 – $427
#5P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0449Missing, loose, or damaged gas capTighten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#2P0332Faulty knock sensorReplace knock sensorKnock sensor: $297 – $381
Faulty knock sensor harnessReplace knock sensor harnessKnock sensor harness: $14 – $66
Faulty temperature sensorReplace temperature sensorTemperature sensor: $392 – $427
#3P0455Missing, loose, or damaged gas capTighten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#4P0442Missing, loose, or damaged gas capTighten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#2P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#3P0101Engine air filter is very dirtyReplace the engine air filterAir filter $50-70
Mass airflow sensor is dirty or brokenReplace the mass airflow sensorMass air flow sensor $220-320
Catalytic converter is damaged or wornReplace the catalytic converterCatalytic converter $1720-1780
#4P0332Faulty knock sensorReplace knock sensorKnock sensor: $297 – $381
Faulty knock sensor harnessReplace knock sensor harnessKnock sensor harness: $14 – $66
Faulty temperature sensorReplace temperature sensorTemperature sensor: $392 – $427

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#2P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#3P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80
#4P0332Faulty knock sensorReplace knock sensorKnock sensor: $297 – $381
Faulty knock sensor harnessReplace knock sensor harnessKnock sensor harness: $14 – $66
Faulty temperature sensorReplace temperature sensorTemperature sensor: $392 – $427

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0101Engine air filter is very dirtyReplace the engine air filterAir filter $50-70
Mass airflow sensor is dirty or brokenReplace the mass airflow sensorMass air flow sensor $220-320
Catalytic converter is damaged or wornReplace the catalytic converterCatalytic converter $1720-1780
#2P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#3P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#4P0332Faulty knock sensorReplace knock sensorKnock sensor: $297 – $381
Faulty knock sensor harnessReplace knock sensor harnessKnock sensor harness: $14 – $66
Faulty temperature sensorReplace temperature sensorTemperature sensor: $392 – $427
#5P0700Defective shift solenoidsReplace shift solenoidsShift solenoid: $200 – $500
Defective Valve BodyReplace valve BodyValve Body: $300 – $1000
Faulty TransmissionReplace TransmissionTransmission: $1800 – $3400

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#2P0430Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#3P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#4P0674Glow plug failureReplace glow plugGlow plug: $230 – $290

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0050Faulty upstream oxygen sensorReplace upstream oxygen sensorOxygen sensor: $275 – $500 
#2P0700Defective shift solenoidsReplace shift solenoidsShift solenoid: $200 – $500
Defective Valve BodyReplace valve BodyValve Body: $300 – $1000
Faulty TransmissionReplace TransmissionTransmission: $1800 – $3400
#3P0101Engine air filter is very dirtyReplace the engine air filterAir filter $50-70
Mass airflow sensor is dirty or brokenReplace the mass airflow sensorMass air flow sensor $220-320
Catalytic converter is damaged or wornReplace the catalytic converterCatalytic converter $1720-1780

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#2P0678Glow plug failureReplace glow plugGlow plug: $230 – $290

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#2P0674Glow plug failureReplace glow plugGlow 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 RepairRepair Cost
#1P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#2P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#3P0496Faulty EVAP Purge Volume Control ValveReplace EVAP purge volume control valveEVAP Purge Volume Control Valve $150-$200
Leaking EVAP system hoseReplace EVAP line EVAP Line $20-$100
Faulty EVAP pressure sensorEVAP pressure sensorEVAP Pressure Sensor $280-$330
#4P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#5P0597Faulty thermostatReplace the thermostatThermostat: $140 – $300

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0597Faulty thermostatReplace the thermostatThermostat: $140 – $300
#2P0700Defective shift solenoidsReplace shift solenoidsShift solenoid: $200 – $500
Defective Valve BodyReplace valve BodyValve Body: $300 – $1000
Faulty TransmissionReplace TransmissionTransmission: $1800 – $3400
#3P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#4P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0443Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#2P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0430Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#2P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#3P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsSpark plug wires: $180-$240
#4P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge 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 RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#2P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#3P0449Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#4P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#5P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P2135Faulty throttle body actuatorReplace throttle body actuatorThrottle body actuator $570-$700
Faulty throttle body position sensorReplace throttle body position sensorThrottle position sensor $170-$230
Faulty accelerator pedal position sensorReplace accelerator pedal position sensorAccelerator pedal position sensor $130-$200
Damaged wiringRepair/replace wiringWiring repair/replacement $100-$1000
#2P0449Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#3P0332Faulty knock sensorReplace knock sensorKnock sensor: $297 – $381
Faulty knock sensor harnessReplace knock sensor harnessKnock sensor harness: $14 – $66
Faulty temperature sensorReplace temperature sensorTemperature sensor: $392 – $427
#4P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel 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 RepairRepair Cost
#1P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsSpark plug wires: $180-$240
#2P0449Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#3P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#4P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#5P0174Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak: $100 – $200
Clogged fuel injectorsClean fuel injectorsClean fuel injectors: $50 – $80

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0400Stuck EGR valveReplace the EGR valveEGR valve: $250 – $350
Faulty EGR temperature sensorReplace the EGR temperature sensorEGR temperatute sensor: $220 – $230
#2P0442Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#3P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#4P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge 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 RepairRepair Cost
#1P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#2P0014Engine oil is low or dirtyGet an oil changeOil Change $20-$60
Camshaft variable timing solenoid failureReplace oil control valve/variable valve timing control solenoidOil Control Valve/Variable Valve Timing Control Solenoid $300-$400
Engine failureReplace engineEngine $3000-$4000
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#4P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#5P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0014Engine oil is low or dirtyGet an oil changeOil Change $20-$60
Camshaft variable timing solenoid failureReplace oil control valve/variable valve timing control solenoidOil Control Valve/Variable Valve Timing Control Solenoid $300-$400
Engine failureReplace engineEngine $3000-$4000
#2P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#3P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#4P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900
#5P0526Engine cooling fan control module failureReplace engine cooling fan control module failureEngine cooling fan control module: $800 – $900
Engine cooling fan failureReplace engine cooling fan failureEngine cooling fan: $100 – $400
Engine cooling fan relay failureReplace cooling fan relay failureCooling 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 RepairRepair Cost
#1P0008Faulty timing chainReplace timing chainTiming chain $600-$1200
Faulty reluctor ringReplace reluctor ringReluctor ring $200-$600
#2P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#3P0017Low oil/dirty oilGet an oil change or add oilEngine oil and filter change $20-$60
Timing chain is stretchedReplace timing chainTiming chain: $1,624 to $1,879
Slipped reluctor ring on the crankshaftReplace reluctor ringReluctor ring $200-$600
   
#4P0430Damaged or worn out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair
#5P0496Faulty EVAP Purge Volume Control ValveReplace EVAP purge volume control valveEVAP Purge Volume Control Valve $150-$200
Leaking EVAP system hoseReplace EVAP line EVAP Line $20-$100
Faulty EVAP pressure sensorEVAP pressure sensorEVAP Pressure Sensor $280-$330

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#2P1101Faulty mass airflow sensorReplace the mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensor harnessReplace the mass airflow sensor harnessReplace mass airflow sensor: $230 – $330
Dirty air filterReplace air filterReplace air filter: $20 – $80
#3P0496Faulty EVAP Purge Volume Control ValveReplace EVAP purge volume control valveEVAP Purge Volume Control Valve $150-$200
Leaking EVAP system hoseReplace EVAP lineEVAP Line $20-$100
Faulty EVAP pressure sensorEVAP pressure sensorEVAP Pressure Sensor $280-$330
#4P0420Damaged or worn-out catalytic converterReplace catalytic converterReplace catalytic converter: $400-$2400
Broken O2 sensorReplace downstream O2 sensorOxygen sensor replacement: $275-$500
Exhaust leakSeal exhaust leakExhaust leak: $100-$200 (if welded to repair)
#5P0299Faulty turbo or superchargerReplace turbo or superchargerTurbo or supercharger: $300 – $3400
Faulty boost pressure sensorReplace boost pressure sensorBoost pressure sensor: $200 – $220

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0449Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#2P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#3P0455Missing, loose, or damaged gas capTIghten or replace gas capMissing or damaged gas cap: $0-$20
Leak in EVAP lineFix leap in EVAP lineEVAP line: $20-$100
EVAP vent control valve is damaged or stuckReplace EVAP vent control valveEVAP vent control valve: $150-$200
EVAP purge volume control valve is damaged or stuckReplace EVAP purge volume control valvePurge volume control valve: $150-$200
#4P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P0135Faulty upstream oxygen sensorReplace oxygen sensorOxygen Sensor $200-$300
Blown fuseReplace fuseFuse $5
Damaged or shorted wiring or connectionsReplace or repair wiringWiring repair/replacement $100-$1000
#2P0440Damaged charcoal cannisterReplace charcoal cannisterReplace charcoal cannister: $753 – $1000
Loose or missing gas capReplace or tighten gas capReplace or tighten gas cap: $0 – $20
Faulty purge valveReplace purge valveReplace purge valve: $109 – $172
#3P0171Dirty mass airflow sensorClean mass airflow sensorClean mass airflow sensor: $20 – $100
Faulty mass airflow sensorReplace mass airflow sensorReplace mass airflow sensor: $230 – $330
Vacuum leaks – PCV hoses, vacuum hoses, intake manifold gasketSeal vacuum leakVacuum leak $100 – $200
#4P0128Faulty engine coolant thermostatReplace engine coolant thermostatReplace engine coolant thermostat: $40 – $190
#5P0300Spark plug is worn or brokenReplace spark plugsSpark plugs: $66-$250
Ignition coils are brokenReplace ignition coilsIgnition Coils: $230-$640 (some cars require Intake manifold removal)
Spark plug wires are wornReplace spark plug wiresSpark plug wires: $180-$240
Fuel injectors are brokenReplace fuel injectorsFuel injectors: $1500-$1900

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

 DTC Codes Most Common Causes RepairRepair Cost
#1P1FFFFaulty coolant level sensorReplace coolant level sensorCoolant level sensor: $330 – $350
#2P0401Faulty EGR valveReplace EGR valveEGR valve: $332 to $413
Engine vacuum leakFix vacuum leakVacuum 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.

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FIXD Research Team

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.

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