P27D9Pressure Control Solenoid T 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
- P27D9 is logged when solenoid T fails to build the pressure it is asked for. Ford's 2024 OBD overview for the TR9070 dual-clutch gearbox assigns it to the selector pilot valve (SELPV) when that valve stays hydraulically off. That pilot valve moves the selector valve, which decides which shift rods the synchronizer valves SPV1 to SPV4 act on; Ford keeps separate codes for the selector valve and the whole selector mechanism (P178D, P178B). No thresholds are published. GM's Corvette dual-clutch box has the same kind of valve but files its stuck-off fault under P2829, not P27D9. If the selector cannot switch, part of the gear set is unreachable. Fluid level, contamination and the pilot valve itself are the first checks.
- What you may notice
- MIL on
- Several gears unavailable
- Gearbox in fallback mode
- Likely causes
- LikelySelector pilot valve stuck closed
- PossibleLow or contaminated transmission fluid
- RareSelector valve spool binding in its bore
- 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.