Powertrain, generic (extended)

P27CC Pressure Control Solenoid R Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

With P27CC the transmission controller has seen solenoid R lose its circuit or its effect for short moments only. A public, code-specific manufacturer description does not exist. The two known users of solenoid R, GM's Corvette dual-clutch transmission (23OBDG07, valve 4) and Ford's TR9070 (SPV4), document only lasting electrical faults and stuck conditions for it. CARB 13 CCR 1968.2 requires output monitoring for automatic transmission solenoids. Since the fault may have healed by the time the car reaches the workshop, freeze frame records, the number of occurrences and a careful look for oil wicking into connectors or a loose pin are more telling than one resistance reading.

Likely causes

Loose or spread terminal pin
Transmission fluid wicking into the connector
Harness conductor breaking under vibration

Symptoms

  • Intermittent MIL
  • Sporadic rough or delayed shift

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–800
Time1–4 h

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

Parts involved

pressure control solenoid rwiring harness

Related codes

P27CBP27CDP27CFP27D0P27C4

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