How to Turn Off the Service Engine Soon Light on a Ford Pickup
- 1). Connect the OBD-II scanner to the OBD-II diagnostic connector on your vehicle. The OBD-II connector unit is usually located behind a panel in or below the dash on the driver's side.
- 2). Run a diagnostic scan per the instructions pertaining to your particular OBD-II scanner. Retrieve the trouble code. Write the trouble code down for later reference.
- 3). Clear the trouble code using your particular scanner's reset mode to turn the light off.
Source...