What does code P27A9 mean?

Q: What does code P27A9 mean?

Pressure Control Solenoid C Data Incompatible. P27A9 indicates that the Transmission Control Module (TCM) has received data from the Pressure Control Solenoid C circuit that is outside the expected range or inconsistent with other sensor inputs. The TCM monitors the solenoid's electrical current and hydraulic response, and when the data does not match commanded values, it sets this code and typically illuminates the warning light.

DTC codes / P27xx · Transmission / P27A9

P27A9Pressure Control Solenoid C Data Incompatible

P27A9 indicates that the Transmission Control Module (TCM) has received data from the Pressure Control Solenoid C circuit that is outside the expected range or inconsistent with other sensor inputs. The TCM monitors the solenoid's electrical current and hydraulic response, and when the data does not match commanded values, it sets this code and typically illuminates the warning light.

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.