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How to Replace an El Camino Oxygen Sensor

Because oxygen sensors monitor the fuel-to-air mix ratio, most cars that did not integrate catalytic converters in their exhaust systems did not have oxygen sensors. The sensor not only regulates the fuel/air ratio, it also transmits the information to the powertrain control module (PCM) via a voltage signal and makes compensatory adjustments. The fifth-generation El Camino is the only design of the vehicle that used a combined catalytic converter-oxygen sensor emission control system.

Instructions

1

Lift the El Camino onto a car lift and bring it up to a comfortable height to work at from underneath. Put on the safety glasses before getting under the vehicle.

2

Locate the catalytic converter near the center of the El Caminos undercarriage and follow it to the front Y-pipe for the oxygen sensor.

3

Follow the wire coming from the oxygen sensor to the nearby wire harness plug. Unplug the sensor wire from the harness plug.

4

Spray the exposed threads of the sensor with a generous amount of penetrating oil.

5

Place the wire through the closed end of a box-end wrench and place the wrench on the hexagon-shaped base of the sensor. Turn the sensor counterclockwise to unthread it from the exhaust pipe. Remove the oxygen sensor. If necessary, apply heat to the exhaust pipe area and expand the metal of the pipe to help remove the sensor.

6

Apply a light amount of anti-seize compound on the threads of the replacement sensor. Do not let the compound come into contact with the sensors head.

7

Screw the sensor into the exhaust pipes porthole by hand and then snug it tightly with the wrench.

8

Plug the oxygen sensor wire back into the wire harness plug.

Posted by Unknown at 4:15 AM

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