What does code P1728 mean?

Q: What does code P1728 mean?

Transmission Slip Error. P1728 on Ford vehicles indicates the transmission control module (TCM) has detected an excessive amount of slip in the transmission, meaning the engine speed and output shaft speed do not match the commanded gear ratio. The computer compares input and output speed sensors to calculate slip and sets this code when the discrepancy exceeds a calibrated threshold.

DTC codes / Ford codes / P1728

P1728 · FordTransmission Slip Error

P1728 on Ford vehicles indicates the transmission control module (TCM) has detected an excessive amount of slip in the transmission, meaning the engine speed and output shaft speed do not match the commanded gear ratio. The computer compares input and output speed sensors to calculate slip and sets this code when the discrepancy exceeds a calibrated threshold.

SystemPowertrain

Code typeFord specific

SeverityHigh

Fix difficultyProfessional

AreaTransmission

Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.