What does code P07A1 mean?

Q: What does code P07A1 mean?

Transmission Friction Element H Slip Detected. P07A1 indicates that the transmission control module (TCM) has detected an excessive slip in friction element H, which is a clutch or band inside the automatic transmission. The computer compares input and output shaft speeds and commands a specific gear, then flags this code when the expected engagement does not match the actual slip beyond a calibrated threshold.

DTC codes / P07xx · Transmission / P07A1

P07A1Transmission Friction Element H Slip Detected

P07A1 indicates that the transmission control module (TCM) has detected an excessive slip in friction element H, which is a clutch or band inside the automatic transmission. The computer compares input and output shaft speeds and commands a specific gear, then flags this code when the expected engagement does not match the actual slip beyond a calibrated threshold.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

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.