Oxygen Sensor: Service and Repair

HEATED OXYGEN SENSOR (HO2S) AND CATALYST MONITOR SENSOR - 2.3L

Removal and Installation

1. Disconnect the negative battery cable.
2. With the vehicle in NEUTRAL, position on a hoist.




3. Remove the bolts and the exhaust manifold heat shield.




4. Disconnect the heated oxygen sensor (HO2S) and the catalyst monitor sensor electrical connectors.

NOTE: If necessary, lubricate the HO2S and catalyst monitor sensor with Penetrating and Lock Lubricant to aid in removal.

5. Using the special tool, remove the HO2S and catalyst monitor sensor.

NOTE: Apply a light coat of High Temperature Nickel Anti-Seize Lubricant to the threads of the HO2S to aid in installation.

6. To install, reverse the removal procedure.