Oxygen Sensor: Service and Repair

Oxygen Sensor:

The oxygen sensor uses a permanently attached pigtail and connector. This pigtail should not be removed from the oxygen sensor. Damage or removal of the pigtail or connector could affect proper operation of the oxygen sensor.
Take care when handling the oxygen sensor. The in-line electrical connector and louvered end must be kept free of grease, dirt or other contaminants. Also, avoid using cleaning solvents of any type. Do not drop or roughly handle the oxygen sensor.
The oxygen sensor may be difficult to remove when engine temperature is below 48 degrees C (120 degrees F). Excessive force may damage threads in exhaust manifold or exhaust pipe.
1. Disconnect battery ground cable.
2. Remove electrical connector.
3. Carefully back out Oxygen sensor.
IMPORTANT: A special anti-seize compound is used on the oxygen sensor threads. The compound consists of a liquid graphite 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 it is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.
4. Coat threads of oxygen sensor with anti-seize compound.
5. Install sensor and torque to 41 N-m (30 ft.lbs.).
6. Connect electrical connector.
7. Connect negative battery cable.