What does code P27C1 mean?

Q: What does code P27C1 mean?

Pressure Control Solenoid P Performance/Stuck Off. P27C1 indicates the transmission control module (TCM) has detected a performance fault or stuck-off condition in a pressure control solenoid, meaning the solenoid is not responding as commanded or is failing to regulate hydraulic pressure. The TCM compares commanded current or duty cycle against actual pressure sensor feedback and sets this code when the solenoid's behavior falls outside the expected range.

DTC codes / P27xx · Transmission / P27C1

P27C1Pressure Control Solenoid P Performance/Stuck Off

P27C1 indicates the transmission control module (TCM) has detected a performance fault or stuck-off condition in a pressure control solenoid, meaning the solenoid is not responding as commanded or is failing to regulate hydraulic pressure. The TCM compares commanded current or duty cycle against actual pressure sensor feedback and sets this code when the solenoid's behavior falls outside the expected range.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaTransmission

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.