What does code P27AA mean?

Q: What does code P27AA mean?

Pressure Control Solenoid D Data Incompatible. P27AA indicates that the transmission control module (TCM) has received data from pressure control solenoid D that is outside the expected range or inconsistent with other sensor inputs. The computer compares solenoid D's commanded current or hydraulic response against known good values and flags the code when the data does not match the programmed parameters.

DTC codes / P27xx · Transmission / P27AA

P27AAPressure Control Solenoid D Data Incompatible

P27AA indicates that the transmission control module (TCM) has received data from pressure control solenoid D that is outside the expected range or inconsistent with other sensor inputs. The computer compares solenoid D's commanded current or hydraulic response against known good values and flags the code when the data does not match the programmed parameters.

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.