What does code P27C8 mean?

Q: What does code P27C8 mean?

Pressure Control Solenoid P Control Circuit High. P27C8 indicates that the transmission control module (TCM) has detected an abnormally high voltage on the electrical circuit for pressure control solenoid P, which is one of the hydraulic pressure regulators inside the transmission valve body. The TCM expects the solenoid's control circuit to pull the voltage down to a specific range when commanded, and a reading above that threshold tells the module the circuit is open, shorted to power, or the solenoid winding has failed.

DTC codes / P27xx · Transmission / P27C8

P27C8Pressure Control Solenoid P Control Circuit High

P27C8 indicates that the transmission control module (TCM) has detected an abnormally high voltage on the electrical circuit for pressure control solenoid P, which is one of the hydraulic pressure regulators inside the transmission valve body. The TCM expects the solenoid's control circuit to pull the voltage down to a specific range when commanded, and a reading above that threshold tells the module the circuit is open, shorted to power, or the solenoid winding has failed.

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.