Powertrain, generic (extended)

P27D3 Pressure Control Solenoid S Electrical

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P27D3 reports an electrical problem with pressure control solenoid S without saying which kind. No manufacturer publishes this code. GM, the only maker known to fit a fifth synchronizer valve (Corvette dual-clutch, 23OBDG07 and 24OBDG07), monitors that valve with separate codes from the S block: P27D5 open load, P27D7 short to ground and P27D8 short to battery, current error or a short to a neighbouring output found at shutdown, all Type A. P27D3 would therefore come from a controller that does not differentiate. CARB 13 CCR 1968.2 calls for circuit checks on transmission actuators. Check the coil, connector and harness first.

Likely causes

Solenoid S coil open or shorted
Corroded or loose connector at the transmission
Damaged wiring between TCM and solenoid S

Symptoms

  • MIL on
  • Gears on rod 5 unavailable
  • Limp mode possible

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–900
Time1–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

pressure control solenoid stcmwiring harness

Related codes

P27D4P27D5P27D7P27D8P27CB

References: law.cornell.edu, gsi.ext.gm.com, gsi.ext.gm.com.