P08C6 code meaning
Pressure Control Solenoid M Electrical
Powertrain system Generic code P08xx codes Check engine light
What P08C6 means
Collective code for an electrical fault of pressure control solenoid M without a finer split into open, low or high. No manufacturer documents it publicly. GM, the documented user of letter M on the Corvette dual clutch (synchronizer actuation valve 1), reports electrical faults only through the specific codes P08C8, P08CA and P08CB, which are derived from the diagnostic status of the low-side driver chip and confirmed after 150 ms. CARB requires a circuit check for every monitored transmission solenoid. A manufacturer setting P08C6 would point to coil, connector or harness of this valve; for the driver this means the warning light and restricted shifting on the affected shaft.
P08C6 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P08C6
- Check engine light on
- Restricted shifting or fallback mode
Common causes of P08C6
- Most likelySolenoid coil open or shorted
- PossibleDamaged connector or internal harness
- Less likelyFaulty driver stage in the transmission control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid mTCMTransmission wiring
What each part of P08C6 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8 | Area: transmission. |
| C6 | The exact fault in that area. |
What to do next
- Note P08C6 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 P08C6
What does P08C6 mean?
P08C6 means "Pressure Control Solenoid M Electrical". Collective code for an electrical fault of pressure control solenoid M without a finer split into open, low or high. It is a generic code, so it means the same on every make.
Is it safe to drive with P08C6?
Drive gently and only to a workshop. With P08C6 the car can go into limp mode (reduced power) to protect itself.
Will P08C6 fail an emissions test?
Yes, it can. P08C6 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 P08C6 to fix?
Difficulty: hard. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P08C6 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.