Powertrain, generic · Transmission

P0965 Pressure Control Solenoid B Control Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Worn or internally faulty solenoid, current no longer matches the command
Debris sticking the solenoid or its regulator valve
Internal leak in the CVT primary pulley circuit
High resistance in connector or pass-through

Symptoms

  • Rough or delayed 3rd, 5th or reverse engagement
  • CVT ratio fluctuates, engine speed flares
  • Often no warning light on six-speed applications

Repair estimate

DifficultyHardWorkshop job
Parts and labour€200–2,500
Time1–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

pressure control solenoid bwiring harnesstcm

Related codes

P0964P0966P0967P0961P0969P0776

References: saabwisonline.com, gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com.