Post Catalytic Converter

REMOVAL PROCEDURE

NOTE:
- The Heated Oxygen Sensors each use a permanently attached pigtail and connector. This pigtail should not be removed from the heated oxygen sensor. Damage or removal of the pigtail or connector could affect proper operation of the heated oxygen sensor.
- Take care when handling the rear heated oxygen sensor (HO2S 2). The in-line connector and louvered end must be kept free of grease, dirt or other contaminants. Avoid using cleaning solvents of any type. DO NOT drop or roughly handle the HO2S 2.




1. Turn OFF the ignition.
2. Disconnect the HO2S 2 connector, in the Engine Compartment.
3. Raise the vehicle. Refer to Vehicle Lifting.
4. Carefully remove the HO2S 2.

NOTE: The use of excessive force may damage the threads in the exhaust manifold/pipe.

INSTALLATION PROCEDURE

IMPORTANT: A special anti-seize compound is used on the HO2S 2 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 already have the compound applied to the threads. If the sensor is removed and is to be reinstalled, the threads must be coated with an anti-seize compound before reinstallation.




1. Coat the threads only of the HO2S 2 with anti-seize compound, if necessary.
2. Install the HO2S 2.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten
Tighten the HO2S 2 to 41 N.m (30 lb ft).

3. Lower the vehicle.
4. Reconnect the HO2S 2 connector, in the engine compartment.