Our automotive experts have put together the following information about the P0A8D 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 P0A8D code.

OBD II Fault Code

  • OBD II P0A8D

    OBD-II Code Low voltage systems will not operate is defined as a 14 Volt Power Module System Voltage Low

    The 14V Power Module, also referred to as the Accessory DC Power Module, monitors the current to the low voltage systems. If the voltage gets too low, the 14V Power Module will set code P0A8D and disable the low voltage system.

    Low voltage systems will not operate Symptoms

    • Low voltage systems will not operate

    Common Problems That Trigger the P0A8D Code

    • 14v power module failure
    • 14V power module software update needed

    Common Repairs Needed for the P0A8D Code

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