AutoCodes – Generic – P2197

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

Quick Answer

The Engine Control Module (ECM) uses the heated oxygen sensor information to regulate the air-fuel ratio close to a stoichiometric ratio. Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection. 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 Front Heated Oxygen Sensor Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection.
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.

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Code Popularity 27,359

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2197 Description

The Engine Control Module (ECM) uses the heated oxygen sensor information to regulate the air-fuel ratio close to a stoichiometric ratio. This maximizes the catalytic converter’s ability to purify the exhaust gas. The sensor detects oxygen levels in the exhaust gas and sends this signal to the ECM. The inner surface of the sensor element is exposed to outside air. The outer surface of the sensor element is exposed to exhaust gas. The sensor element is made of platinum coated zirconia and includes an inte- grated heating element. The heated oxygen sensor has the characteristic whereby its output voltage changes suddenly in the vicinity of the stoichiometric air-fuel ratio. The heated oxygen sensor generates output voltage between 0 V and 1.0 V in response to the oxygen concentration in exhaust gas. When the output voltage of the heated oxygen sensor is 0.55 V or more, the ECM judges that the air-fuel ratio is RICH. When it is 0.4 V or less, the ECM judges that the air-fuel ratio is LEAN. Under normal condition, the output voltage from the heated oxygen sensor alternates RICH and LEAN sides periodically. If the heated oxygen sensor outputs RICH signal (or LEAN signal) constantly, or if the heated oxygen sensor cannot output enough voltage to reach the minimum specification, the ECM interprets this as a malfunction in the heated oxygen sensor and sets a DTC.

OBDII Code P2197 - Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1 - AutoCodes.com — P2197 Code - Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2197?

Faulty Front Heated Oxygen Sensor Bank 2
Front Heated Oxygen Sensor Bank 2 harness is open or shorted
Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Vacuums leaks

How to Fix the DTC P2197?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2197 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2197 code?

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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.