P0961: Pressure Control Solenoid A Control Circuit Range/Performance

What does P0961 mean?

Performance fault of pressure control solenoid A: the circuit is electrically intact, but the solenoid does not behave as commanded. On GM's six-speeds, where A is the line pressure solenoid, the Saab 9-4X 6T70 sets it when measured and commanded current differ for 5 s, GM's 2018 table after 4.4 of 5 s; both Type B, two trips. Allison 1000 flags a current error of 0.5 A or more in 40 of 80 samples (Type A). Ford's 2023 diesel summary lists it as a PC A current range fault. In GM's CVT, A feeds the secondary pulley: a pressure error above 500 kPa steady or 1,500 kPa transient, confirmed by a ratio error, sets it after 5 s. Electrical faults are P0960, P0962 and P0963. The module usually commands maximum line pressure and freezes adaptations.

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

Symptoms

• Harsh or erratic shifts
• MIL or transmission warning after the second drive
• Slipping or ratio flare on CVT applications

Common causes

• High Solenoid with internal electrical or mechanical fault, current no longer follows the command
• Medium Debris or varnish in the fluid sticking the solenoid or regulator valve
• Medium High resistance at connector or pass-through distorting the current
• Low Low fluid level causing pressure errors (CVT pulley monitor)

Likelihood is a general estimate across vehicles; your make and model may differ.