P27D2Pressure Control Solenoid S 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
- With P27D2 the TCM concludes that solenoid S applies pressure that was never requested. GM is the only maker publishing it, for shift solenoid 5 of the Corvette dual-clutch gearbox (23OBDG07, carried over to 24OBDG07). Because valve 5 serves rod 5 on its own, there is no partner rod to relax; instead the trigger is far larger: rod 5 must drift 4,000 µm or more within 200 ms after the selector valve changes position although its force target is zero. The result is Type A with the MIL. Ford's four-valve TR9070 does not have the code. Expect the gears on rod 5 to be blocked and possibly a harsh engagement or a fallback mode.
- What you may notice
- MIL on
- Harsh engagement or clunk
- Gears on rod 5 blocked, fallback mode
- Likely causes
- LikelySpool of solenoid S jammed open
- PossibleParticles keeping valve S from venting
- RareWorn armature or seat in solenoid S
- 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.