What does code P27CD mean?

Q: What does code P27CD mean?

Pressure Control Solenoid R Control Circuit/Open. P27CD indicates that the transmission control module (TCM) has detected an open circuit or excessive resistance in the control circuit for pressure control solenoid R, which is used to regulate hydraulic pressure inside the automatic transmission. The TCM monitors the solenoid's electrical path and sets this code when the expected current or voltage is outside the normal range, often resulting in degraded shift quality or limp mode.

DTC codes / P27xx · Transmission / P27CD

P27CDPressure Control Solenoid R Control Circuit/Open

P27CD indicates that the transmission control module (TCM) has detected an open circuit or excessive resistance in the control circuit for pressure control solenoid R, which is used to regulate hydraulic pressure inside the automatic transmission. The TCM monitors the solenoid's electrical path and sets this code when the expected current or voltage is outside the normal range, often resulting in degraded shift quality or limp mode.

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.