P27D2 code meaning
Pressure Control Solenoid S Stuck On
Powertrain system Generic code P27xx codes Check engine light
What P27D2 means
With P27D2 the TCM concludes that solenoid S applies pressure that was never requested. GM is the only maker publishing it, for shift solenoid 5 of the Corvette dual-clutch gearbox (23OBDG07, carried over to 24OBDG07). Because valve 5 serves rod 5 on its own, there is no partner rod to relax; instead the trigger is far larger: rod 5 must drift 4,000 µm or more within 200 ms after the selector valve changes position although its force target is zero. The result is Type A with the MIL. Ford's four-valve TR9070 does not have the code. Expect the gears on rod 5 to be blocked and possibly a harsh engagement or a fallback mode.
P27D2 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 P27D2
- MIL on
- Harsh engagement or clunk
- Gears on rod 5 blocked, fallback mode
Common causes of P27D2
- Most likelySpool of solenoid S jammed open
- PossibleParticles keeping valve S from venting
- Less likelyWorn armature or seat in solenoid S
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid sValve body
What each part of P27D2 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. |
| D2 | The exact fault in that area. |
What to do next
- Note P27D2 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 P27D2
What does P27D2 mean?
P27D2 means "Pressure Control Solenoid S Stuck On". With P27D2 the TCM concludes that solenoid S applies pressure that was never requested. It is a generic code, so it means the same on every make.
Is it safe to drive with P27D2?
Drive gently and only to a workshop. With P27D2 the car can go into limp mode (reduced power) to protect itself.
Will P27D2 fail an emissions test?
Yes, it can. P27D2 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 P27D2 to fix?
Difficulty: workshop only. A typical repair takes 2 to 8 hours of work. This is a job for a workshop.
Will P27D2 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.