P27C6Pressure Control Solenoid P Control Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P27C6 describes a control circuit for solenoid P that is neither open nor shorted but behaves outside its expected range, for example current that does not track the command. No manufacturer documents this code publicly. GM does run such a plausibility test on synchronizer actuation valve 3 of the Corvette dual-clutch unit (23OBDG07), comparing the estimated current with the target, yet assigns a failure to P27C8, not to P27C6; Ford's TR9070 table has no range code for SPV3 either. CARB 13 CCR 1968.2 expects functional or at least circuit monitoring of automatic transmission solenoids. Suspects are a winding whose resistance changes with temperature, corroded contacts adding resistance, or unstable supply voltage.
- What you may notice
- MIL on
- Inconsistent shift quality on the affected rods
- Likely causes
- LikelyCoil resistance drifting with temperature
- PossibleCorroded contacts adding series resistance
- RareUnstable TCM supply voltage
- 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.