P27C7Pressure Control Solenoid P Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P27C7 points to a control circuit of solenoid P that is too low, effectively a short to ground on the switched side. GM's 23OBDG07 Corvette dual-clutch table checks synchronizer actuation valve 3 with its low-side switch on and expects the sense resistor voltage to be pulled down only so far; a reading under about 1.7 V (±0.5 V) for 150 ms is reported by the driver chip as a ground short, Type A, provided the engine is not cranking and battery voltage lies between 8.75 and 18 V. With that line grounded, valve 3 may stay energized regardless of command. Ford lists the same failure as a shorted switch on SPV3 of the TR9070. Inspect harness routing near the case and the connector for moisture.
- What you may notice
- MIL on
- Unwanted application of rods 3/4, gears blocked
- Limp mode
- Likely causes
- LikelyControl wire shorted to ground against the case
- PossibleMoisture or oil bridging pins in the connector
- RareSolenoid winding shorted to its housing
- 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.