Our automotive experts have put together the following information about the P0B27 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 P0B27 code.

OBD II Fault Code

  • OBD II P0B27

    OBD-II Code High voltage system may not operate is defined as a Hybrid Battery "B" Voltage

    The high voltage battery is composed of many individual battery cells. The Battery Energy Control Module (BECM) monitors all the cells in the high voltage battery pack to make sure they are all contributing equally to the high voltage system. If one cell is determined to be unequally contributing, code P0B27 will be set.

    High voltage system may not operate Symptoms

    • High voltage system may not operate

    Common Problems That Trigger the P0B27 Code

    • Battery Energy Control Module (BECM) failure
    • High voltage battery assembly failure
    • Wiring issue
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