P27C2Pressure Control Solenoid P Stuck On
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P27C2 means solenoid P keeps pressurizing after it should have vented. GM's dual-clutch Corvette table 23OBDG07 (and 24OBDG07) detects this on shift solenoid 3 by watching what happens just after the selector valve switches: if one of rods 3 and 4 travels 1,000 µm or more within 200 ms without a command while the other one drops back by at least 125 µm, valve 3 is judged hydraulically stuck on, Type A. Which rod moves and which relaxes depends on the selector position. Ford's 2024 overview gives P27C2 to SPV3 on the TR9070. Unwanted rod motion can drag a gear in, so the controller usually blocks the affected gears; clunks or a sudden neutral are possible.
- What you may notice
- MIL on and gears blocked by the controller
- Clunk or grinding during gear changes
- Unexpected loss of drive (neutral)
- Likely causes
- LikelySpool of solenoid P jammed in the open (pressure-applying) position
- PossibleWear particles in the fluid keeping the valve from closing
- RareWorn valve bore letting pressure bypass to the actuator
- 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: €300 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.