P27D8Pressure Control Solenoid S Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P27D8 says the control line of solenoid S sits too high. GM bundles three checks for valve 5 of the Corvette dual-clutch box under it (23OBDG07, 24OBDG07), all Type A. First, with the output on, a sense voltage above 700, 900 or 1,100 mV, depending on whether supply is below 11.5 V, between 12 and 15 V or above 15.5 V, means a short to battery. Second, coil current that misses its target by more than 70 % for 60 ms or by 400 mA for 300 ms. Third, a short to a neighbouring output found while every output is cycled at shutdown; it is stored in memory and set on the next start. Ford's TR9070 has no valve S. An energized valve 5 then fails to move rod 5, so its gears stay out of reach.
- What you may notice
- MIL on, possibly only after the next start
- Rod 5 gears out of reach
- Limp mode
- Likely causes
- LikelyControl wire touching a supply line
- PossibleShort to the wire of another valve output
- PossibleSolenoid S coil with shorted turns
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.