Clearing trouble codes on a Ford Ranger is a simple and easy task that anyone can do. Trouble codes are set off by the truck’s computer when it detects a problem, which can be as simple as a loose gas cap, or as severe as an engine misfire. For cars that are model year 1996 or newer, the codes can be read by an OBD-2 scanner; for cars that are 1995 or older, an OBD-1 scanner is used. Once the code has been read and the problem fixed, the trouble codes need to be reset, which can be accomplished by disconnecting the truck’s battery.
Step 1: Put the vehicle in park and turn off the ignition.