P27D1Pressure Control Solenoid S Performance/Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P27D1 flags pressure control solenoid S as unable to produce force. Only GM documents it publicly: in the Corvette dual-clutch tables 23OBDG07 and 24OBDG07 it is shift solenoid 5, the only one of these valves serving a single rod, rod 5, which it moves in both directions depending on the selector position. If the intrusive integrity routine sees 100 µm or less of travel on rod 5 while valve 5 is applied, the fault is stored as Type A. Ford's TR9070 has just four synchronizer valves, so the code does not appear there. Gears carried on rod 5 become unavailable; fluid condition, a sticking spool or a leak in the rod actuator are the first things to check.
- What you may notice
- MIL on
- Gears on rod 5 unavailable
- Gearbox in substitute mode
- Likely causes
- LikelySpool of solenoid S sticking closed
- PossibleLow or worn-out transmission fluid
- PossibleLeak at the rod 5 actuator piston
- 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.