Oxygen Sensor: Service and Repair

CAUTION: The oxygen sensor has a permanently attached wire and connector. This should not be removed, as removal will affect engine performance and emissions.

1. Disconnect oxygen sensor electrical connector.
2. Using a suitable tool, carefully remove the sensor from exhaust manifold or pipe. The oxygen sensor may be easier to remove when engine temperature is above 120°F.
CAUTION: Excessive force may damage threads in exhaust manifold or pipe.
3. If a new sensor is being used, verify that the threads are coated with anti-seize compound, then install the new sensor in the manifold or pipe.
4. If a used sensor is being used, coat sensor threads with a nickel based anti-seize compound, then install the sensor into the manifold or pipe. Do not use graphite or other anti-seize compounds.
5. Torque the oxygen sensor to specifications, then connect the electrical connector. Refer to MECHANICAL SPECIFICATIONS for sensor torque value.