FORD 2011 Fiesta v.1 - Manual (Page 23)

Oil life monitoring system reset
To reset the oil service light and clear the oil change message after
servicing use the following procedure:
1. With the ignition in the off position, press the brake and accelerator
pedals.
2. Turn the key to the accessory position for keyed vehicles and for push
button start vehicles press the Start/Stop button once quickly. DO NOT
attempt to start the engine.
3. Press the accelerator and brake pedals fully for 20 seconds.
4. ENGINE OIL CHANGE DUE NEXT SERVICE and will display.
5. Turn the vehicle off. The message and lights will be cleared.
Instrument Cluster
23
2011 Fiesta (fie)
Owners Guide, 1st Printing
USA (fus)