Oxygen Sensor: Service and Repair

The oxygen sensor has a permanently attached pig-tail and connector. This pig-tail should not be removed, since 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 the exhaust manifold or pipe. The oxygen sensor may be difficult to remove when the engine temperature is below 120°F. Use CAUTION, since excessive force may damage the threads in exhaust manifold or pipe.
3. If a new oxygen sensor is being used, install the sensor into the manifold or pipe.
4. If the old sensor is being reused, coat the threads with anti-seize compound, and then install the sensor into the manifold or pipe.
5. Torque the oxygen sensor to specifications, then reconnect electrical connector. See MECHANICAL SPECIFICATIONS for sensor torque specifications.