P0945 Code - Hydraulic Pump Relay Circuit/Open

Discussion in 'P - Powetrain Codes' started by fault code, Mar 31, 2018.

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    fault code Administrator Staff Member

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    What does P0945 Mean?

    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.

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    What are the common causes of P0945 ?
    • Faulty Hydraulic Pump Relay
    • Hydraulic Pump Relay harness is open or shorted
    • Hydraulic Pump Relay circuit poor electrical connection


    How do you troubleshoot P0945 ?

    Like the all engines, the car engine system employs specially developed hydraulic lifters (known as switching roller followers) for the P0945 code intake and exhaust valves. The lifters can be collapsed by disengaging an internal locking pin. The locking pin is disengaged using solenoids to alter oil pressure fed into the lifter.

    Searches related to P0945 Code - Hydraulic Pump Relay Circuit/Open
    • P0945
    • P0946
     

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