P08C3 code meaning
Pressure Control Solenoid M
Powertrain system Generic code P08xx codes Check engine light
What P08C3 means
Base code for the thirteenth pressure control solenoid; the letter is assigned by the manufacturer. GM uses letter M in the Tremec eight-speed dual clutch of the Corvette (RPO M1L/M1M): its 2023–2025 TCM tables name the part synchronizer actuation valve 1, which serves the odd-gear shaft, while valves 2 to 5 report under P27B9 onwards. GM does not set this base code but the specific ones: P08C4 and P08C5 for hydraulic sticking, P08C8, P08CA and P08CB for the circuit. No other manufacturer documents P08C3 publicly. If it appears, the module has seen a non-specific fault of this valve; the driver typically notices the warning light and rough or missing gear changes on that shaft.
P08C3 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P08C3
- Check engine light on
- Rough or missing shifts in odd gears
- Possible fallback mode
Common causes of P08C3
- Most likelyValve sticking from debris in the valve body
- PossibleFault in the solenoid wiring or connector
- Less likelyWorn or failed solenoid
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid mValve body
What each part of P08C3 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. |
| C3 | The exact fault in that area. |
What to do next
- Note P08C3 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 P08C3
What does P08C3 mean?
P08C3 means "Pressure Control Solenoid M". Base code for the thirteenth pressure control solenoid; the letter is assigned by the manufacturer. It is a generic code, so it means the same on every make.
Is it safe to drive with P08C3?
Drive gently and only to a workshop. With P08C3 the car can go into limp mode (reduced power) to protect itself.
Will P08C3 fail an emissions test?
Yes, it can. P08C3 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 P08C3 to fix?
Difficulty: workshop only. A typical repair takes 1 to 6 hours of work. This is a job for a workshop.
Will P08C3 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.