P27C6 code meaning
Pressure Control Solenoid P Control Circuit Range/Performance
Powertrain system Generic code P27xx codes Check engine light
What P27C6 means
P27C6 describes a control circuit for solenoid P that is neither open nor shorted but behaves outside its expected range, for example current that does not track the command. No manufacturer documents this code publicly. GM does run such a plausibility test on synchronizer actuation valve 3 of the Corvette dual-clutch unit (23OBDG07), comparing the estimated current with the target, yet assigns a failure to P27C8, not to P27C6; Ford's TR9070 table has no range code for SPV3 either. CARB 13 CCR 1968.2 expects functional or at least circuit monitoring of automatic transmission solenoids. Suspects are a winding whose resistance changes with temperature, corroded contacts adding resistance, or unstable supply voltage.
P27C6 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 P27C6
- MIL on
- Inconsistent shift quality on the affected rods
Common causes of P27C6
- Most likelyCoil resistance drifting with temperature
- PossibleCorroded contacts adding series resistance
- Less likelyUnstable TCM supply voltage
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 P27C6 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. |
| C6 | The exact fault in that area. |
What to do next
- Note P27C6 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 P27C6
What does P27C6 mean?
P27C6 means "Pressure Control Solenoid P Control Circuit Range/Performance". P27C6 describes a control circuit for solenoid P that is neither open nor shorted but behaves outside its expected range, for example current that does not track the command. It is a generic code, so it means the same on every make.
Is it safe to drive with P27C6?
Drive gently and only to a workshop. With P27C6 the car can go into limp mode (reduced power) to protect itself.
Will P27C6 fail an emissions test?
Yes, it can. P27C6 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 P27C6 to fix?
Difficulty: medium. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P27C6 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.