How to Replace an Oxygen Sensor

Oxygen Sensor Replacement

Safety Tip:Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or closed toe shoes.

1

Park the vehicle on a level surface. Set the parking brake and open the hood.

2

With the engine off and cool, locate the defective oxygen sensor in the exhaust manifold or pipe. If necessary, lift the front of the vehicle and support it with jack stands.

Photo may not be specific to your vehicle

3

Disconnect the wire connector at the defective oxygen sensor. Spray the sensor threads and fitting with penetrating spray and let soak for a time.

Photo may not be specific to your vehicle

4

Remove the oxygen sensor from the exhaust system. Use an oxygen sensor socket to reduce potential for damage.

5

If you are installing a universal oxygen sensor, cut off the connector from the original sensor and splice the connector wires to the new oxygen sensor. Follow the manufacturer's instructions supplied with the sensor.

6

For threaded oxygen sensors, apply a slight amount of anti-seize compound to the threads and install the new sensor.

7

For flange mounted oxygen sensors, install a new gasket and tighten the mounting bolts.

8

Reattach the wire connector from the sensor.

9

If necessary, connect the OBD I/II scanner and erase the fault code.

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