P0965Pressure Control Solenoid B Control Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Performance fault of pressure control solenoid B: wiring is intact, but current or resulting pressure does not match the command. In the Saab 9-4X 6T70, solenoid 2 feeds the 3-5-reverse clutch; a current mismatch for 5 s sets a Type C code without MIL and freezes that clutch's adaptations, and GM's 2016 six-speed table also lists it without MIL. Allison 1000 checks for a current error of 0.5 A or more within 250 ms windows (Type A). In GM's CVT, B controls the primary pulley: a pressure error above 500 kPa steady or 1,500 kPa transient, confirmed by a ratio error for 5 s, sets a Type A code. Electrical faults of B are P0964, P0966 and P0967. Symptoms range from none to rough 3rd, 5th or reverse, or CVT ratio problems.
- What you may notice
- Rough or delayed 3rd, 5th or reverse engagement
- CVT ratio fluctuates, engine speed flares
- Often no warning light on six-speed applications
- Likely causes
- LikelyWorn or internally faulty solenoid, current no longer matches the command
- PossibleDebris sticking the solenoid or its regulator valve
- PossibleInternal leak in the CVT primary pulley circuit
- RareHigh resistance in connector or pass-through
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €200 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.