OBD II Fault Code

  • OBD II P2601

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Coolant Pump "A" Control Circuit Range/Performance

    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 control module (PCM) determines that the Oxygen Sensor is not fluctuating throughout the normal range, the PCM will set code P2195.

    Common Problems That Trigger the P2601 Code

    • Coolant Heat Storage (CHS) water pump failure
    • Coolant Heat Storage (CHS) water pump relay
    • Powertrain Control Module (PCM) failure
    • Wiring issue

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