P27C2 code meaning
Pressure Control Solenoid P Stuck On
Powertrain system Generic code P27xx codes Check engine light
What P27C2 means
P27C2 means solenoid P keeps pressurizing after it should have vented. GM's dual-clutch Corvette table 23OBDG07 (and 24OBDG07) detects this on shift solenoid 3 by watching what happens just after the selector valve switches: if one of rods 3 and 4 travels 1,000 µm or more within 200 ms without a command while the other one drops back by at least 125 µm, valve 3 is judged hydraulically stuck on, Type A. Which rod moves and which relaxes depends on the selector position. Ford's 2024 overview gives P27C2 to SPV3 on the TR9070. Unwanted rod motion can drag a gear in, so the controller usually blocks the affected gears; clunks or a sudden neutral are possible.
P27C2 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 P27C2
- MIL on and gears blocked by the controller
- Clunk or grinding during gear changes
- Unexpected loss of drive (neutral)
Common causes of P27C2
- Most likelySpool of solenoid P jammed in the open (pressure-applying) position
- PossibleWear particles in the fluid keeping the valve from closing
- Less likelyWorn valve bore letting pressure bypass to the actuator
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid pValve body
What each part of P27C2 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. |
| C2 | The exact fault in that area. |
What to do next
- Note P27C2 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 P27C2
What does P27C2 mean?
P27C2 means "Pressure Control Solenoid P Stuck On". P27C2 means solenoid P keeps pressurizing after it should have vented. It is a generic code, so it means the same on every make.
Is it safe to drive with P27C2?
Drive gently and only to a workshop. With P27C2 the car can go into limp mode (reduced power) to protect itself.
Will P27C2 fail an emissions test?
Yes, it can. P27C2 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 P27C2 to fix?
Difficulty: workshop only. A typical repair takes 2 to 8 hours of work. This is a job for a workshop.
Will P27C2 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.