P2197 OBD-II: O2 Sensor Signal Biased/Stuck Lean
P2197 Severity
Will P2197 go away on its own?
Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.
For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.
Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.
What causes OBD-II fault code P2197?
The Oxygen Sensor (or Air/Fuel Ratio Sensor) tells the engine control module how much oxygen is in the exhaust stream between the engine and the Catalytic Converter. The Oxygen Sensor's signal is supposed to fluctuate a minimum of 10 times per second within a specified range. If the engine's control module (PCM) determines that the Oxygen Sensor is not fluctuating throughout the normal range, the PCM will set code P2197.
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What Does P2197 Code Mean?
OBD-II Code P2197 is defined as a O2 Sensor Signal Biased/Stuck Lean
The Oxygen Sensor (or Air/Fuel Ratio Sensor) tells the engine control module how much oxygen is in the exhaust stream between the engine and the Catalytic Converter. The Oxygen Sensor's signal is supposed to fluctuate a minimum of 10 times per second within a specified range. If the engine's control module (PCM) determines that the Oxygen Sensor is not fluctuating throughout the normal range, the PCM will set code P2197.
P2197 Symptoms
- Decreased engine performance
- Increased fuel consumption
Common Problems That Trigger the P2197 Code
- Oxygen sensor failure
- Powertrain Control Module (PCM) failure
- Powertrain Control Module (PCM) software needs to be updated
- Wiring issue
Common Repairs Needed for the P2197 Code
Ask our experts about P2197.
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