Oxygen Sensor: Service and Repair

The oxygen sensor has a permanently attached wire and connector. This should not be removed, since the removal will affect proper operation of the oxygen sensor.

1. Disconnect electrical connector from oxygen sensor.

2. Using a suitable oxygen sensor wrench, carefully remove the sensor from exhaust manifold or pipe. The oxygen sensor may be difficult to remove when engine temperature is below 120°F.
CAUTION: Excessive force may damage threads in exhaust manifold or pipe.

3. If a new sensor is being used, install the new sensor into the manifold or pipe.

4. If an old sensor is being reused, coat threads with anti-seize compound, then install the sensor into the manifold or pipe.

5. Torque the oxygen sensor to 30-36 lb.ft. (40-50 Nm), and reconnect the electrical connector.