P27D6 code meaning
Pressure Control Solenoid S Control Circuit Range/Performance
Powertrain system Generic code P27xx codes Check engine light
What P27D6 means
P27D6 would indicate that the circuit of solenoid S is still closed but its electrical behaviour does not fit what the module commands. There is no public manufacturer description. On the Corvette dual-clutch transmission GM does compare target and estimated coil current of valve 5 (a 70 % gap held 60 ms, or a 400 mA gap held 300 ms, per 23OBDG07), yet files that result under the high-circuit code P27D8, so P27D6 stays unused there. CARB 13 CCR 1968.2 only sets the general duty to check actuator circuits. If another controller stores it, likely culprits are added resistance at a crimp, a coil whose ohms have drifted with age and heat, or a TCM output stage losing strength.
P27D6 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 P27D6
- MIL on
- Uneven shifts into rod 5 gears
Common causes of P27D6
- Most likelyAdded resistance at a crimp or pin
- PossibleSolenoid S coil resistance out of specification
- Less likelyTCM output stage losing strength
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid sWiring harness
What each part of P27D6 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. |
| D6 | The exact fault in that area. |
What to do next
- Note P27D6 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 P27D6
What does P27D6 mean?
P27D6 means "Pressure Control Solenoid S Control Circuit Range/Performance". P27D6 would indicate that the circuit of solenoid S is still closed but its electrical behaviour does not fit what the module commands. It is a generic code, so it means the same on every make.
Is it safe to drive with P27D6?
Drive gently and only to a workshop. With P27D6 the car can go into limp mode (reduced power) to protect itself.
Will P27D6 fail an emissions test?
Yes, it can. P27D6 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 P27D6 to fix?
Difficulty: medium. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P27D6 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.