Oxygen Sensor: Service and Repair

1. Disconnect battery ground cable, then remove air cleaner.
2. Disconnect oxygen sensor connector, then remove sensor using tool C-45S9
3. Inspect wire and connector for deterioration. If insulation is frayed to the extent that the connector or terminal is visible, replace sensor. Inspect water splash shield which is a metal band around the upper portion (sleeve) of the sensor and covers the vent holes. If splash shield is not intact, replace sensor.
4. To install sensor, coat threads of sensor with a nickel base anti-seize compound such as Loctite LO-607 or Never Seize NSN, or equivalent. Do not use graphite or other type compounds as these could electrically insulate the sensor from the manifold.
5. Install and torque sensor to 30-40 ft. lbs. using tool C-4589.
6. Install air cleaner and connect battery cable.