P08C3Pressure Control Solenoid M
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Base code for the thirteenth pressure control solenoid; the letter is assigned by the manufacturer. GM uses letter M in the Tremec eight-speed dual clutch of the Corvette (RPO M1L/M1M): its 2023–2025 TCM tables name the part synchronizer actuation valve 1, which serves the odd-gear shaft, while valves 2 to 5 report under P27B9 onwards. GM does not set this base code but the specific ones: P08C4 and P08C5 for hydraulic sticking, P08C8, P08CA and P08CB for the circuit. No other manufacturer documents P08C3 publicly. If it appears, the module has seen a non-specific fault of this valve; the driver typically notices the warning light and rough or missing gear changes on that shaft.
- What you may notice
- Check engine light on
- Rough or missing shifts in odd gears
- Possible fallback mode
- Likely causes
- LikelyValve sticking from debris in the valve body
- PossibleFault in the solenoid wiring or connector
- RareWorn or failed solenoid
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €200 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.