Oxygen Sensor: Service and Repair

The following procedure should be performed with engine temperature over 120° F., otherwise the oxygen sensor may be difficult to remove.

1. Disconnect battery ground cable.
2. Disconnect oxygen sensor electrical connector, then carefully loosen oxygen sensor and remove.
3. Reverse procedure to install. Torque sensor to 30 ft. lbs. Replacement oxygen sensors should have a special anti-seize compound applied to threads. If replacement sensor is lacking anti-seize compound or original sensor is to be re-installed, coat threads with suitable anti-seize compound.