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. engine code P0945P0945 fixobd P0945dtc P0945obd code P0945obd2 P0945P0945 car codediagnostic code P0945car code P0945check engine code P0945fehlercode P0945P0945 fiatcodigo P0945codigo falla P0945P0945 kody b??dówcodigo de falla P0945 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