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Our automotive experts have put together the following information about the P0945 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 P0945 code.

OBD II Fault Code

  • OBD II P0945

    OBD-II Code Transmission may not shift properly is defined as a Hydraulic Pump Relay Circuit/Open

    The clutch uses hydraulic pressure to engage and disengage the clutch as well as shift gears. The Transmission Control Module uses a relay to control hydraulic pump that produces the pressure in the system. If the relay does not function as requested, code P0945 is stored.

    Transmission may not shift properly Symptoms

    • Transmission may not shift properly

    Common Problems That Trigger the P0945 Code

    • Hydraulic pump relay failure
    • Transmission Control Module (TCM) failure
    • Wiring issue
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