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OBD II Fault Code

  • OBD II P0B33

    OBD-II Code High voltage system may not operate is defined as a High Voltage Service Disconnect Circuit

    The Service Disconnect Port allows the high voltage system to be disabled so the vehicle can be safely serviced. The Battery Energy Control Module (BECM) monitors the service disconnect plug and shuts down all electrical systems when the service plug is disconnected. If the BECM can not correctly determine if the service plug is connected, code P0B33 will be stored.

    High voltage system may not operate Symptoms

    • High voltage system may not operate

    Common Problems That Trigger the P0B33 Code

    • Battery Energy Control Module (BECM) failure
    • Damaged service disconnect plug
    • Service disconnect plug is not properly connected
    • Wiring issue
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