Wednesday, September 25, 2013

How to Replace O2 Sensors in a 1997 Ford Explorer

Your 1997 Ford Explorer has two oxygen sensors built into the exhaust system. The oxygen sensors monitor the amount of oxygen in the exhaust to help the truck regulate how much fuel it burns. When an oxygen sensor fails, your truck may burn more fuel than necessary, reducing your fuel mileage drastically. You can replace the oxygen sensors quickly in your own driveway. Buy new sensors from an auto parts store or a Ford dealership.

Instructions

    1

    Raise your Explorer with a jack and secure it on a set of jack stands. Locate the oxygen sensors on the exhaust positioned before and after the catalytic converter.

    2

    Disconnect the wiring harness from the oxygen sensor by pulling the connector straight off. Use an oxygen sensor socket and ratchet to remove the oxygen sensor from the exhaust pipe.

    3

    Install the new oxygen sensor by hand to avoid cross threading the sensor. Once the sensor is secure, tighten it with the oxygen sensor socket and ratchet.

    4

    Press the wiring harness connector onto the new sensor until it is secure. The wiring harness should click when it is secure.

    5

    Repeat the process for the second oxygen sensor if you are replacing both. Raise the vehicle with the jack and remove the jack stands. Lower the truck to the ground.


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