P27DE code meaning
Pressure Control Solenoid T Control Circuit Range/Performance
Powertrain system Generic code P27xx codes Check engine light
What P27DE means
P27DE would be set if the circuit of solenoid T is intact but delivers readings the controller considers implausible. No manufacturer documents the code. For the selector pilot valve of the TR9070, Ford's 2024 summary knows just three electrical faults, namely open load, shorted load and shorted switch, and GM checks the comparable Corvette pilot valve under its own K-block codes. CARB 13 CCR 1968.2 prescribes the general circuit and function monitoring for such actuators. Where a module does use P27DE, it hints at a gradual change rather than a clean break: a terminal with rising contact resistance, a coil whose resistance has crept away from nominal, or an output stage in the TCM that no longer regulates current properly.
P27DE at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P27DE
- MIL on
- Hesitant or inconsistent gear selection
Common causes of P27DE
- Most likelyRising contact resistance at a terminal
- PossibleSolenoid T resistance drifted from nominal
- Less likelyTCM output no longer regulating current
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid tWiring harness
What each part of P27DE 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. |
| DE | The exact fault in that area. |
What to do next
- Note P27DE 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 P27DE
What does P27DE mean?
P27DE means "Pressure Control Solenoid T Control Circuit Range/Performance". P27DE would be set if the circuit of solenoid T is intact but delivers readings the controller considers implausible. It is a generic code, so it means the same on every make.
Is it safe to drive with P27DE?
Drive gently and only to a workshop. With P27DE the car can go into limp mode (reduced power) to protect itself.
Will P27DE fail an emissions test?
Yes, it can. P27DE 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 P27DE to fix?
Difficulty: medium. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P27DE clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.