Heated Oxygen Sensor (HO2S) Replacement (HO2S1)

NOTE:
^ The Heated Oxygen Sensor (HO2S) and the Oxygen Sensor use a permanently attached pigtail and connector. Do not remove this pigtail from the Heated Oxygen Sensor. Damage or the removal of the pigtail or the connector could affect the proper operation of the sensor.
Take care when handling the HO2S and the O2S. Keep the in-line electrical connector and the louvered end free of grease, dirt, or other contaminants. Also avoid using cleaning solvents of any type. Do not drop the HO2S or the O2S. Do not roughly handle the HO2S or the O2S.
^ Remove oxygen sensors with the engine temperature above 48°C (120°F). Otherwise the oxygen sensors may be difficult to remove.
^ A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.

TOOLS REQUIRED
J39194 Oxygen Sensor Wrench

BANK 1 SENSOR 1 REMOVAL PROCEDURE




1. Remove the fuel injection sight shield.
2. Turn OFF the ignition switch.
3. Remove the HO2S retaining clip from the bracket.
4. Disconnect the HO2S electrical connector tab from the HO2S 1 retaining clip.
5. Remove the HO2S electrical connector retainer.
6. Raise and support the vehicle. Refer to Vehicle Lifting.
7. Remove the rear oxygen sensor from the rear exhaust manifold carefully using the J 39194

BANK 1 SENSOR 1 INSTALLATION PROCEDURE

NOTE: Refer to Fastener Notice in Service Precautions.




1. Install the rear oxygen sensor in the rear exhaust manifold.

Tighten
Tighten the rear HO2S to 41 Nm (30 lb ft).




2. Lower the vehicle.
3. Connect the electrical connector to the HO2S.
4. Connect the HO2S electrical connector tab to the bracket.
5. Install the HO2S electrical connector retainer.
6. Install the fuel injection sight shield.