Neutral Profile Correction - Fiesta

In order for the misfire detection system to function correctly, any mechanical inaccuracies in the crankshaft position (CKP) sensor must be learned by the PCM. Neutral profile should be relearned any time the PCM, CKP sensor or the crankshaft pulse wheel is replaced or major engine repairs have been completed.

Misfire detection is active before profile learning has been completed using default thresholds. When profile has been learned the vehicle specific thresholds are then used.

Neutral profile correction is learned on the road by decelerating with deceleration fuel shut off (DFSO) active. Profile correction is continuous throughout the lifetime of the vehicle, when ever the learning conditions are met adaption takes place. The neutral profile correction can only be completed using the OBD Drive Cycle. Refer to the ON BOARD DIAGNOSTIC (OBD) DRIVE CYCLE  for additional information.