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OBD II Fault Code

  • OBD II P2277

    OBD-II Code Decreased engine performance is defined as a O2 Sensor Signal Biased/Stuck Rich

    The oxygen sensor measures the amount of oxygen in the exhaust between the engine and the catalytic converter. This sensor is supposed to fluctuate a minimum of 10 times per second within a specified voltage. If the engine's control module (PCM) does not see the correct fluctuations, the PCM will set code P2277.

    Decreased engine performance Symptoms

    • Decreased engine performance
    • Increased fuel consumption

    Common Problems That Trigger the P2277 Code

    • Clogged air filter
    • Oxygen sensor failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue

    Common Repairs Needed for the P2277 Code

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