P0A9A - OBD II Trouble Code

January 31, 2017

Our automotive experts have put together the following information about the P0A9A 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 P0A9A code.

OBD II Fault Code

  • OBD II P0A9A

OBD-II Code High voltage system may not operate is defined as a Hybrid Battery Pack Cooling Fan 2 Control Circuit High

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 P0A9A Code

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

About the Author

Brad Kava is an automotive expert at RepairPal, the leading online source of auto repair resources and estimates. With many ASE Master certified mechanics on staff who have decades of experience, RepairPal knows all the fine points of car repair.

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