Oxygen Sensor: Service and Repair

Oxygen Sensor

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. Use CAUTION, since 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 specifications, then reconnect the electrical connector. Refer to MECHANICAL SPECIFICATIONS for sensor torque value.