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Engine-Codes – Generic – P2197

P2197 Code - Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1

Quick Answer

The P2197 diagnostic trouble code (DTC) indicates that the oxygen sensor signal for Bank 2 Sensor 1 is biased or stuck lean. Common causes include Faulty oxygen sensor, Vacuum leak in the intake system, Fuel delivery problem. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P2197 indicates Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1.
Common causes
Common causes include Faulty oxygen sensor, Vacuum leak in the intake system, Fuel delivery problem.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P2197 Description

The P2197 diagnostic trouble code (DTC) indicates that the oxygen sensor signal for Bank 2 Sensor 1 is biased or stuck lean. This means that the oxygen sensor is detecting a consistently lean air-fuel mixture in the exhaust gases from the corresponding bank of cylinders. The oxygen sensor plays a crucial role in monitoring the oxygen levels in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion.

OBDII Code P2197 - Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
P2197 Code - Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1

Common Causes of P2197

  1. Faulty oxygen sensor
  2. Vacuum leak in the intake system
  3. Fuel delivery problem
  4. Issues with the engine control module (ECM)
  5. Exhaust system leaks

Symptoms of P2197

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Hesitation or stumbling during acceleration
  4. Check Engine Light illuminated
  5. Engine misfires

How to Fix P2197

  1. Diagnose the root cause of the issue by performing a thorough inspection of the oxygen sensor, intake system, fuel delivery system, and ECM.
  2. Replace the oxygen sensor for Bank 2 Sensor 1 if it is found to be faulty.
  3. Repair any vacuum leaks in the intake system and ensure all connections are secure.
  4. Check the fuel delivery system for any issues such as clogged fuel injectors or a failing fuel pump.
  5. If necessary, reprogram or replace the ECM to address any issues with its functionality.

Cost to Fix P2197

The typical repair costs for addressing a P2197 code can vary depending on the specific cause of the issue. Replacing a faulty oxygen sensor can cost between $100 and $300, including parts and labor. Repairing vacuum leaks or fuel delivery problems may range from $100 to $500, depending on the extent of the repairs needed. Reprogramming or replacing the ECM can cost between $200 and $600. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the specific repairs required. It's advisable to consult with a qualified mechanic for a more accurate cost estimate.

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Code P2197 Information for Specific Makes

  • P2197 Acura — Front Air/Fuel Ratio Sensor 1 Bank 2 Signal Stuck Lean
  • P2197 BMW — O2 Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
  • P2197 Chrysler — Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
  • P2197 Dodge — Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
  • P2197 Ford — Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
  • P2197 Honda — Front Air/Fuel Ratio Sensor 1 Bank 2 Signal Stuck Lean
  • P2197 Jeep — Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
  • P2197 Lexus — Oxygen Sensor Signal Stuck Lean Bank 2 Sensor 1
  • P2197 Lincoln — Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
  • P2197 Mercury — Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
  • P2197 MINI — O2 Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
  • P2197 RAM — Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
  • P2197 Toyota — Oxygen Sensor Signal Stuck Lean Bank 2 Sensor 1
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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