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

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