What does code P27CA mean?

Q: What does code P27CA mean?

Pressure Control Solenoid R Stuck On. P27CA indicates that the transmission control module (TCM) has detected a fault where pressure control solenoid R is stuck in the energized or 'on' state, meaning it is commanding a pressure change that the solenoid is not responding to correctly. The TCM monitors the solenoid's electrical circuit and hydraulic response, and when the expected pressure change does not occur or the circuit shows continuous current flow, it sets this code and typically illuminates the malfunction indicator lamp (MIL).

DTC codes / P27xx · Transmission / P27CA

P27CAPressure Control Solenoid R Stuck On

P27CA indicates that the transmission control module (TCM) has detected a fault where pressure control solenoid R is stuck in the energized or 'on' state, meaning it is commanding a pressure change that the solenoid is not responding to correctly. The TCM monitors the solenoid's electrical circuit and hydraulic response, and when the expected pressure change does not occur or the circuit shows continuous current flow, it sets this code and typically illuminates the malfunction indicator lamp (MIL).

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

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.