What does code P27D9 mean?

Q: What does code P27D9 mean?

Pressure Control Solenoid T Performance/Stuck Off. P27D9 indicates that the transmission control module (TCM) has detected a performance problem or a stuck-off condition with the pressure control solenoid T, which regulates hydraulic pressure inside the transmission. The computer compares commanded solenoid current or pressure against actual measured pressure or solenoid response and sets this code when the expected change does not occur within a calibrated time window.

DTC codes / P27xx · Transmission / P27D9

P27D9Pressure Control Solenoid T Performance/Stuck Off

P27D9 indicates that the transmission control module (TCM) has detected a performance problem or a stuck-off condition with the pressure control solenoid T, which regulates hydraulic pressure inside the transmission. The computer compares commanded solenoid current or pressure against actual measured pressure or solenoid response and sets this code when the expected change does not occur within a calibrated time window.

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.