P27D0 code meaning
Pressure Control Solenoid R Control Circuit High
Powertrain system Generic code P27xx codes Check engine light
What P27D0 means
P27D0 is the high-side counterpart of P27CF for solenoid R: the control line reads too high, most often because it touches battery voltage or another output. GM applies the same driver diagnostics to synchronizer actuation valve 4 of the Corvette dual-clutch box as to the other valves (23OBDG07, 24OBDG07): a sense voltage stuck above 0.7-1.1 V while switched on, a large gap between target and estimated current, or a cross-short to a neighbouring line found during the switch-off routine and reported on the next start, each Type A. Ford's TR9070 overview lists shorted load of SPV4 under this code. A coil with too few ohms can also cause it, so measure resistance before replacing the harness.
P27D0 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 P27D0
- MIL on, sometimes only after restart
- Gears on rods 3/4 not available
- Limp mode
Common causes of P27D0
- Most likelyControl line touching battery voltage
- PossibleCross-short to a neighbouring solenoid line
- PossibleSolenoid R coil resistance too low
- Less likelyDefective TCM driver
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid rWiring harness
What each part of P27D0 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. |
| D0 | The exact fault in that area. |
What to do next
- Note P27D0 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 P27D0
What does P27D0 mean?
P27D0 means "Pressure Control Solenoid R Control Circuit High". P27D0 is the high-side counterpart of P27CF for solenoid R: the control line reads too high, most often because it touches battery voltage or another output. It is a generic code, so it means the same on every make.
Is it safe to drive with P27D0?
Drive gently and only to a workshop. With P27D0 the car can go into limp mode (reduced power) to protect itself.
Will P27D0 fail an emissions test?
Yes, it can. P27D0 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 P27D0 to fix?
Difficulty: medium. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P27D0 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.