Ford 2.5L Index of Articles

Testing the heater element of the rear oxygen sensor (HO2S 12) is not difficult on the 1998, 1999, 2000, and 2001 2.5L Ford Ranger or Mazda B2500. In this tutorial I'll... [read more]

In this tutorial I'll explain how to test the front oxygen sensor (HO2S 11) heater on the 1998, 1999, 2000, or 2001 2.5L Ford Ranger and Mazda B2500 pickup truck. When a... [read more]

This is the typical circuit diagram of the front oxygen sensor (HO2S 11) of the 1998, 1999, 2000 2.5L Ford Ranger and 1998-2000 2.5L Mazda B2500. The front O2 sensor... [read more]

This is the typical ignition system wiring diagram for the 1998, 1999, 2000, and 2001 2.5L Ford Ranger and Mazda B2500. The ignition system is made up of two ignition... [read more]