P27DA code meaning
Pressure Control Solenoid T Stuck On
Powertrain system Generic code P27xx codes Check engine light
What P27DA means
P27DA marks solenoid T as delivering pressure while it should be vented. Ford lists it in the 2024 overview for the TR9070 for a selector pilot valve whose hydraulic output stays on; neighbouring entries P178C and P178A cover the selector valve and the complete selector mechanism stuck on. Ford gives no detection limits. For comparison, GM detects the same fault on the Corvette selector pilot valve (code P282A, 23OBDG07) during a synchronizer integrity routine: small test movements of the rods show whether the selector sits in the opposite position to the one commanded, and a current-profile check of the pilot valve separates it from the selector spool. A selector locked in one position sends shifts to the wrong rods, so the TCM blocks gears.
P27DA at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor2 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P27DA
- MIL on
- Gears locked out, wrong gear engagement possible
- Fallback mode
Common causes of P27DA
- Most likelySelector pilot valve held open by dirt
- PossibleWorn seat or armature in solenoid T
- Less likelyAbrasion particles from clutch or synchronizer wear
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid tValve body
What each part of P27DA means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| DA | The exact fault in that area. |
What to do next
- Note P27DA and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P27DA
What does P27DA mean?
P27DA means "Pressure Control Solenoid T Stuck On". P27DA marks solenoid T as delivering pressure while it should be vented. It is a generic code, so it means the same on every make.
Is it safe to drive with P27DA?
Drive gently and only to a workshop. With P27DA the car can go into limp mode (reduced power) to protect itself.
Will P27DA fail an emissions test?
Yes, it can. P27DA is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P27DA to fix?
Difficulty: workshop only. A typical repair takes 2 to 8 hours of work. This is a job for a workshop.
Will P27DA clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.