P08CA code meaning
Pressure Control Solenoid M Control Circuit Low
Powertrain system Generic code P08xx codes Check engine light
What P08CA means
GM sets this code on the Corvette's Tremec dual clutch for a short to ground in the circuit of synchronizer actuation valve 1, which serves the odd-gear shaft. The test runs while the low-side driver is switched on: the sense pin should then sit at a defined level, and if the driver chip reports it below about 1.7 V (±0.5 V), a ground short is assumed. Confirmation takes 150 ms at 8.75 to 18 V battery voltage with the engine not cranking, and the check is suspended when P0882 or P0883 is present. Type A, MIL at once, monitored continuously. Valves 2 to 5 have their own low codes (P27BF onwards). The driver should expect a fallback mode until the wiring fault is repaired.
P08CA 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 P08CA
- Check engine light on immediately
- Fallback mode with restricted gears
Common causes of P08CA
- Most likelyControl wire chafed through to ground
- PossibleShorted turns in the solenoid coil
- Less likelyFluid in the transmission connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid mWiring harness
What each part of P08CA 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. |
| CA | The exact fault in that area. |
What to do next
- Note P08CA 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 P08CA
What does P08CA mean?
P08CA means "Pressure Control Solenoid M Control Circuit Low". GM sets this code on the Corvette's Tremec dual clutch for a short to ground in the circuit of synchronizer actuation valve 1, which serves the odd-gear shaft. It is a generic code, so it means the same on every make.
Is it safe to drive with P08CA?
Drive gently and only to a workshop. With P08CA the car can go into limp mode (reduced power) to protect itself.
Will P08CA fail an emissions test?
Yes, it can. P08CA 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 P08CA to fix?
Difficulty: hard. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P08CA clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.