What does code P27DD mean?

Q: What does code P27DD mean?

Pressure Control Solenoid T Control Circuit/Open. P27DD indicates that the transmission control module (TCM) has detected an open circuit or excessive resistance in the control circuit for pressure control solenoid T, which is one of several solenoids that regulate hydraulic pressure inside the automatic transmission. The TCM monitors the solenoid's electrical path and sets this code when the expected current flow is absent or out of range, meaning the solenoid cannot be commanded properly.

DTC codes / P27xx · Transmission / P27DD

P27DDPressure Control Solenoid T Control Circuit/Open

P27DD indicates that the transmission control module (TCM) has detected an open circuit or excessive resistance in the control circuit for pressure control solenoid T, which is one of several solenoids that regulate hydraulic pressure inside the automatic transmission. The TCM monitors the solenoid's electrical path and sets this code when the expected current flow is absent or out of range, meaning the solenoid cannot be commanded properly.

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.