Remove the oxygen sensor, using the 7/8-inch wrench.5. Spread anti-seize compound on the threads on the new sensor. Screw the sensor in, and tighten the sensor with the wrench.
The forward sensor signals the for free O2 in the method relative to the fuel assortment. It very is used for a comparison of the trailing sensor latest the converter. There should be significantly fewer counts on the rear sensor than the front, indicating that the converter is working. When the counts are rapid to the equivalent, that method that what goes into the converter comes elsewhere unchanged. A rule scanner is the single action to finish which sensor is malfunctioning.
Instructions
1. Plug the code scanner into the OBS Harbour on the lower left side of the steering borderline below the sprint. Turn the ignition material to the "On" position without starting the engine.
2. Press the "Scan" decisive on the statute scanner, which interrogates the machine for failure codes and displays them on the scanner. These codes are faults in the electrical elements under the discipline of the machine, exclusive of mechanical aspects. The codes are displayed as a packages followed by four numbers. The mail designates the pc administration quadrant and the numbers equate particular failure descriptions.
3. Commit to paper this statute and cross-reference it with the law sheet that accompanies the scanner. Here is an example of an oxygen sensor code: 02 (oxygen sensor) - B1 (bank 1) - S2 (sensor number 2 or behind the converter). Bank 1 is displayed even on 4 cylinder engines though there is only 1 bank. On all others such as V6 or V8 engines, bank 1 relates to the side of the engine where the number 1 cylinder is located.
4. Raise and support the truck on jack stands. Locate the indicated sensor. Disconnect the electrical harness connector.Install an O2 Sensor in a 2005 Ford ExpeditionThe 2005 Ford Expedition has two O2 sensors. One Testament always be located forward of the catalytic converter and one extreme.
Turn the ignition key on. Press the "Erase" key on the code scanner to turn off the check engine light and reset the computer.
