P27C7 code meaning
Pressure Control Solenoid P Control Circuit Low
Powertrain system Generic code P27xx codes Check engine light
What P27C7 means
P27C7 points to a control circuit of solenoid P that is too low, effectively a short to ground on the switched side. GM's 23OBDG07 Corvette dual-clutch table checks synchronizer actuation valve 3 with its low-side switch on and expects the sense resistor voltage to be pulled down only so far; a reading under about 1.7 V (±0.5 V) for 150 ms is reported by the driver chip as a ground short, Type A, provided the engine is not cranking and battery voltage lies between 8.75 and 18 V. With that line grounded, valve 3 may stay energized regardless of command. Ford lists the same failure as a shorted switch on SPV3 of the TR9070. Inspect harness routing near the case and the connector for moisture.
P27C7 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 P27C7
- MIL on
- Unwanted application of rods 3/4, gears blocked
- Limp mode
Common causes of P27C7
- Most likelyControl wire shorted to ground against the case
- PossibleMoisture or oil bridging pins in the connector
- Less likelySolenoid winding shorted to its housing
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid pWiring harness
What each part of P27C7 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. |
| C7 | The exact fault in that area. |
What to do next
- Note P27C7 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 P27C7
What does P27C7 mean?
P27C7 means "Pressure Control Solenoid P Control Circuit Low". P27C7 points to a control circuit of solenoid P that is too low, effectively a short to ground on the switched side. It is a generic code, so it means the same on every make.
Is it safe to drive with P27C7?
Drive gently and only to a workshop. With P27C7 the car can go into limp mode (reduced power) to protect itself.
Will P27C7 fail an emissions test?
Yes, it can. P27C7 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 P27C7 to fix?
Difficulty: medium. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P27C7 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.