Caution: Refer to Heated Oxygen and Oxygen Sensor Caution in the Preface section.

Note: The heated oxygen sensor (HO2S) may be difficult to remove when the engine temperature is below 48°C (120°F). Excessive force may damage the threads in the exhaust manifold or exhaust pipe. It may be necessary to lower the exhaust system to gain sufficient access to a HO2S and/or its connector.

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .



2. Disconnect the HO2S electrical connector.
3. Carefully back out the heated oxygen sensor.

Note: A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of graphite suspended in fluid and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the compound applied to the threads. If a sensor is removed from an engine and if for any reason is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.

1. Coat the threads of the heated oxygen sensor with anti-seize compound P/N 12377953, or equivalent if necessary.

Caution: Refer to Fastener Caution in the Preface section.




2. Install the heated oxygen sensor and tighten the HO2S to 41 N·m (30 lb ft) .
3. Connect the HO2S electrical connector.
4. Lower the vehicle.