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OBD II Fault Code

  • OBD II P040A

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Exhaust Gas Recirculation Temperature Sensor "A" Circuit

    An Exhaust Gas Recirculation (EGR) Temperature Sensor is an electrical sensing probe that monitors EGR temperature and transmits the signal to the engine control control module. When the engine control module (PCM) detects an incorrect signal from the EGR Temperature Sensor, the PCM will set code P040A.

    Common Problems That Trigger the P040A Code

    • EGR temperature sensor failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue
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