P0970Pressure Control Solenoid C Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Pressure control solenoid C circuit low, a short to ground in the driver. On GM's six-speeds C is the C456/CBR1 solenoid; on the Saab 9-4X 6T70 it is clutch pressure solenoid 3 for the low/reverse and 4-5-6 clutches. A short for 1 s (Saab) or 0.3 s (GM 2018 table) sets a Type A code: only reverse and 5th gear, no converter lock-up, maximum line pressure. GM's 8-speed uses C for clutch 3 (C13567), the 9- and 10-speeds for CB38 or C23457910 with less than 0.5 ohm counting as a short; GM's dual-clutch gearbox uses it for the odd-clutch shutdown valve. Siblings: P0968 open, P0971 high, P0969 performance. Since the solenoid sits in the valve body, repairs often mean the control solenoid valve assembly.
- What you may notice
- MIL on immediately
- Limp mode in reverse and one forward gear
- Weak acceleration from standstill
- Likely causes
- LikelyInternally shorted solenoid in the control solenoid valve assembly
- PossibleChafed control wire touching ground
- PossibleFluid or moisture in the connector
- 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.