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Our automotive experts have put together the following information about the P0A81 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0A81 code.

OBD II Fault Code

  • OBD II P0A81

    OBD-II Code High voltage system may not operate is defined as a Hybrid Battery Pack Cooling Fan 1 Control Circuit/Open

    The Battery control module controls and monitors the Hybrid Battery cooling fan. If the Battery control module determines that the Battery Cooling Fan is not operating properly, it will set code P0A81.

    High voltage system may not operate Symptoms

    • High voltage system may not operate

    Common Problems That Trigger the P0A81 Code

    • Battery Control Module Failure
    • Clogged battery airflow passageway
    • High voltage battery cooling fan
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