P0751 Cadillac Shift Solenoid A Performance or Stuck Off

Possible causes

– Low transmission fluid level
– Dirty transmission fluid
– Faulty shift solenoid ‘A’ valve
– Shift solenoid ‘A’ valve harness or connectors
– Shift solenoid ‘A’ valve circuit is open or shorted

Tech description

When the a transmission solenoid is stuck off, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is very dirty, it is recommend changing the transmission fluid and if possible removing the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a transmission mechanical failure and that the transmission will need to be rebuilt or replaced.

What about the obd code?

The P0751 Cadillac code is detected when the gear required by the ECM does not match the actual gear when vehicle is driven.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Transmission will not shift gears.

P0751 Cadillac Description

Shift solenoid valve A is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position.