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Our automotive experts have put together the following information about the P0B09 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 P0B09 code.

OBD II Fault Code

  • OBD II P0B09

    OBD-II Code Increased fuel consumption is defined as a AUXILIARY Transmission Fluid Pump Motor Supply Voltage

    The auxiliary Transmission Fluid Pump is used to maintain fluid pressure in the transmission. If the pump does not operate as requested by the engine computer (PCM), code P0B09 is stored.

    Increased fuel consumption Symptoms

    • Increased fuel consumption

    Common Problems That Trigger the P0B09 Code

    • Auxiliary transmission pump relay failure
    • Powertrain Control Module (PCM) failure
    • Wiring issue
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