Powertrain, generic (extended)

P27C3 Pressure Control Solenoid P Electrical

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P27C3 is the general electrical fault code for pressure control solenoid P. No manufacturer documents it publicly. Where solenoid P is known to exist, on GM's Corvette dual-clutch box (23OBDG07, shift solenoid 3) and Ford's TR9070 (SPV3), electrical faults are reported in finer detail: P27C5 for an open load, P27C7 for a shorted switch and P27C8 for a shorted load or excessive current error. A controller with simpler output diagnostics might summarize any of these as P27C3. CARB 13 CCR 1968.2 requires monitoring of transmission output circuits. Measure coil resistance at the transmission connector, then check terminals and the lead to the control unit.

Likely causes

Solenoid P winding open or shorted
Damaged or corroded pin in the transmission connector
Chafed or broken lead between solenoid and TCM
Faulty output stage in the TCM

Symptoms

  • MIL on
  • Gears on the affected shift rods unavailable
  • Transmission in emergency mode

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 pwiring harness

Related codes

P27C4P27C5P27C7P27C8P27CB

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