Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 1

REMOVAL PROCEDURE

NOTE: Refer to Oxygen Sensor Notice in Service Precautions.

IMPORTANT:
- Remove the 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.




1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Support the rear of powertrain frame.
3. Remove the 4 rear frame bolts.
4. Lower the frame no more than 3 inches.
5. Disconnect the rear oxygen sensor electrical connector.
6. Remove the rear oxygen sensor from the rear exhaust manifold.

INSTALLATION PROCEDURE




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

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten
Tighten the rear heated oxygen sensor (HO2S) sensor to 41 N.m (30 lb ft).

2. Connect the rear oxygen sensor connector.
3. Raise the frame.
4. Install the 4 rear frame bolts.

Tighten
Tighten the frame bolts to 100 N.m (74 lb ft).

5. Lower the vehicle.