Bank 1 Sensor 1

Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 1

NOTE: Refer to Oxygen Sensor Notice in Service Precautions. Service Precautions

IMPORTANT:
- 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.







REMOVAL PROCEDURE
1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Support rear of powertrain frame.
3. Remove four rear frame bolts.
4. Lower the frame no more than 76 mm (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. Vehicle Damage Warnings

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 four rear frame bolts.

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

5. Lower the vehicle.