P2197 – Meaning, Causes, Symptoms, & Fixes

Definition of Code P2197

O2 Sensor Signal Stuck Lean- Bank 2 Sensor 1

What Does P2197 Mean?

The P2197 code is a result of the engine control module (ECM) indicating that the oxygen sensor is fluctuating outside its optimal range. This specified range is characterized by a minimum of 10 cycles per second. This sensor is nicknamed the air/fuel (A/F) ratio sensor, as it monitors the air fuel ratio of the exhaust between the engine and the catalytic converter. This code indicates that the engine could be running lean or that there is a fault in the A/F O2 sensor.

What Are the Symptoms of Code P2197?

  • Check engine light
  • Low engine power
  • Engine misfires
  • Engine running rough
  • Engine overheating

What Is the Cause of Code P2197?

  • Frayed oxygen sensor circuit wiring/connectors
  • Faulty bank 2 heated oxygen sensor 1
  • Malfunctioning fuel injector
  • Vacuum leaks
  • Fuel pressure too low
  • Debris in Mass Airflow Sensor
  • Exhaust leak

What Is the Severity of Code P2197?– Severe

Initially, this trouble code will not prevent your vehicle from running. The most common result(s) are lowered fuel economy and lack of power. However, if left unsolved, this code could cause internal engine damage as well as damage to other components, such as the catalytic converter and O2 sensors.

Code P2197 Common Diagnosis Mistakes

Prematurely replacing the oxygen (O2) sensor 1 before attempting to visually inspect the sensor wiring or checking for debris in MAF.

Tools Needed to Diagnose Code P2197:

  • FIXD
  • Fuel Pressure Gauge

How to Diagnose and Repair Code P2197:

Difficulty of Diagnosis and Repair – (3 out of 5)

  1. Check to see if there are any other codes along with P2197 and clear your Check Engine Light with FIXD.
  2. Conduct a visual inspection of wiring around the oxygen sensor(s) for fraying or disconnection.
  3. Visually check mass airflow sensor to see if it needs cleaning; clean as needed. Also, verify the air filter is properly installed, has no holes, and does not allow any debris past it.  
  4. Replace vacuum lines or intake air tube if there are signs of cracks or disconnections.
  5. Check for any exhaust leaks between the engine and the post catalytic O2 sensor. Repair as needed.
  6. Consider replacing oxygen sensor 1 bank 2 if the check-engine light persists.
  7. If the concern persists, check the fuel pressure. If the pressure is low, you may need a fuel pressure regulator or fuel pump.

Estimated Cost of Repair

For error code P2197, one or more of the below repairs may be needed to solve the underlying issue. For each possible repair, the estimated cost of repair includes the cost of the relevant parts and the cost of labor required to make the repair.

  • Oxygen sensor $200-$300
  • Vacuum/Intake leak $100-$200
  • Exhaust repair $100-$200 (if welded to repair)
  • Wiring repair/replacement $100-$1000
  • Fuel pressure regulator $200-$400
  • Fuel Pump $1300-$1700

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Comments 7

S. Chalfant

October 12, 2018

Thank You

Jorge Pastor

April 30, 2019

Clear information to iniciate an inspection


February 2, 2019

I started home from a trip and about halfway home my car started loosing power. it was on and off mainly when i took off the gas it wouldnt go but it was on cruise it was fine i made it home and put the fixd applicator on my car and it told me i had the p2197 and the p2195 that were bad i went to autozone and they had the parts bought them and car runs like magic lol wow thats the best money i ever spend saved me 1000’s of dollars on an autobody shop putting this in we did it our self and it works like a charm now


April 23, 2019

What parts did you end up charging?


May 27, 2019

Code occurred after winter storage first engine run with a loss gas cap. Cleared on its own sencond engine start with a tight cap.


July 27, 2019

Great post!


July 23, 2020

Before installing new O2 sensor, First clean MAF sensor using Mass Air Flow Sensor cleaner ONLY (Read instruction). Replace air filter if necessary.

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