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OBD II Fault Code

  • OBD II P0A77

    OBD-II Code High voltage system may not operate is defined as a Generator Phase W Current High

    The High Voltage control module uses sensors to monitor the current flowing through the high voltage cables. If the High Voltage control module detects a failure of the current monitoring sensors, it will set code P0A77.

    High voltage system may not operate Symptoms

    • High voltage system may not operate

    Common Problems That Trigger the P0A77 Code

    • Inverter/converter assembly failure
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