Every time your transmission changes gears, the ECU has to increase or reduce the hydraulic pressure inside the transmission, that way the shifts aren’t too hard or soft. If there is a low voltage signal on the pressure control solenoid A circuit, the ECU may not be able to command the solenoid properly. This will result in a P0962 DTC being saved.
How Serious is the Code?
If your vehicle has a P0962 diagnostic trouble code, you will likely experience a number of drivability issues that include slipping, unusually harsh shifts, and the engine could stall unexpectedly.
Symptoms of a P0962 include:
- Slipping between gears
- Harsh shifts
- Transmission overheats
- Engine stalls
- Engine misfire-like symptoms
- Limp mode
- Transmission fluid and filter are dirty
- Wiring damage
- Broken or corroded connectors
- Pressure control solenoid has failed
- Transmission pump is failed
- Valve body failure
- TCM/ECU problems
How to Diagnose the Code?
The first step to figuring out what is causing a P0962 OBDII trouble code, is to see if there’s enough transmission fluid in the gearbox. If the transmission fluid is dirty or low, the transmission should be serviced. If there are no issues here, then the wiring and connectors along the transmission wiring harness should be inspected for signs of damage and corrosion. Beyond that, further mechanical diagnosis may be needed to determine if the problem is caused by a faulty pressure control solenoid, transmission pump, valve body or ECU/TCM problems.
What Repairs Will Fix P0962?
- Change the transmission fluid and filter
- Repair or replace damaged wiring and connectors
- Install new pressure control solenoid(s)
- Repair or replace transmission pump
- Repair or replace the valve body
- Reprogram or replace the ECU or TCM
- P0960 – Pressure Control Solenoid “A” Control Circuit/Open
- P0961 – Pressure Control Solenoid “A” Control Circuit Range/Performance
- P0963 – Pressure Control Solenoid “A” Control Circuit High