P0968Pressure Control Solenoid C Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Open circuit in the driver of pressure control solenoid C. GM's 8-speed assigns C to clutch 3 (C13567), the 9-speed to CB38 and the 10-speed to C23457910; an impedance above 200 kOhm for 0.3 s counts as open and sets a Type A code after one trip. In GM's dual-clutch gearbox, C is the redundant shutdown valve of the odd clutch, checked for open load while its output is switched off and confirmed after 150 ms. GM six-speeds report an open C solenoid as P0971, and neither Ford's summaries nor the Allison 1000 tables list C codes. CARB requires circuit checks on transmission output components. Low and high are P0970/P0971, performance P0969; the usual result is a lost gear range or limp mode.
- What you may notice
- MIL and transmission warning on
- Gears that need clutch C are unavailable
- Limp mode in a fixed gear
- Likely causes
- LikelyOpen solenoid coil
- PossiblePoor contact at the transmission connector or internal harness
- PossibleBroken control wire
- RareFaulty output stage in the control module
- 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: €150 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.