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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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