What does code P288D mean?

Q: What does code P288D mean?

Shift Fork B Calibration Not Learned. P288D means the transmission control module (TCM) has not successfully learned the calibrated end-stop positions for shift fork B, which is the fork that engages and disengages one of the gear ranges inside a dual-clutch or automated manual transmission. The computer commands the fork through its travel and watches the position sensor, but the learned values are missing or invalid, so the TCM cannot trust fork B's position for precise gear engagement.

DTC codes / P28xx · Transmission / P288D

P288DShift Fork B Calibration Not Learned

P288D means the transmission control module (TCM) has not successfully learned the calibrated end-stop positions for shift fork B, which is the fork that engages and disengages one of the gear ranges inside a dual-clutch or automated manual transmission. The computer commands the fork through its travel and watches the position sensor, but the learned values are missing or invalid, so the TCM cannot trust fork B's position for precise gear engagement.

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.