What does code P27D5 mean?

Q: What does code P27D5 mean?

Pressure Control Solenoid S Control Circuit/Open. P27D5 means the transmission control module (TCM) has detected an open circuit or excessive resistance in the electrical path for pressure control solenoid S, which is one of the hydraulic pressure regulators inside the transmission valve body. The TCM commands a specific current to the solenoid and monitors the resulting voltage or current feedback; when the circuit does not respond as expected, it logs this code and typically defaults to a safe hydraulic pressure strategy.

DTC codes / P27xx · Transmission / P27D5

P27D5Pressure Control Solenoid S Control Circuit/Open

P27D5 means the transmission control module (TCM) has detected an open circuit or excessive resistance in the electrical path for pressure control solenoid S, which is one of the hydraulic pressure regulators inside the transmission valve body. The TCM commands a specific current to the solenoid and monitors the resulting voltage or current feedback; when the circuit does not respond as expected, it logs this code and typically defaults to a safe hydraulic pressure strategy.

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.