Heated Oxygen Sensor (HO2S) 1 Replacement
HEATED OXYGEN SENSOR (HO2S) 1 REPLACEMENTREMOVAL PROCEDURE
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.
1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Disconnect the intermediate steering shaft from the steering gear.
3. Remove and reposition the front portion of the front fender liners in order to gain access to the frame front bolts.
4. Lower the vehicle.
5. Position a floor jack at the front center section of the frame in order to support the powertrain.
6. Remove the frame front bolts.
7. Carefully lower the powertrain or raise the vehicle in order to gain access to the oxygen sensor.
8. Disconnect the oxygen sensor electrical connector.
NOTE: The use of excessive force may damage the threads in the exhaust manifold/pipe.
IMPORTANT: If the engine temperature is not above 48°C (120°F), the oxygen sensor may be difficult to remove.
9. Remove the heated oxygen sensor (HO2S).
INSTALLATION PROCEDURE
1. NOTE:
- Refer to Fastener Notice in Service Precautions.
- 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.
Install the HO2S.
Tighten
Tighten the HO2S 1 to 42 N.m (31 lb ft).
2. Connect the oxygen sensor electrical connector.
3. Carefully lower the powertrain or raise the vehicle in order to gain access to the oxygen sensor.
4. Use the floor jack in order to raise the powertrain until the frame insulators contact the chassis.
5. Install the frame front bolts.
6. Raise and support the vehicle. Refer to Vehicle Lifting.
7. Install and reposition the front portion of the front fender liners in order to gain access to the frame front bolts.
8. Connect the intermediate steering shaft to the steering gear.
9. Lower the vehicle.