Heated Oxygen Sensor (HO2S) Replacement Bank 2 Sensor 1

REMOVAL PROCEDURE




1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.

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

2. Remove the connector position assurance (CPA) retainer.
3. Disconnect the oxygen sensor electrical connector (1).
4. Remove the oxygen sensor.

INSTALLATION PROCEDURE

IMPORTANT: A special anti-seize compound is used on the heated oxygen sensor (HO2S) threads. The compound consists of liquid graphite and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed for any reason and the sensor is to be reinstalled, the threads must have anti-seize compound applied before the reinstallation.




1. Coat the threads of the oxygen sensor with anti-seize compound GM P/N 5613695, if necessary.

NOTE: Refer to Component Fastener Tightening Notice in Service Precautions.

2. Install the oxygen sensor.

Tighten
Tighten the sensor to 42 N.m (31 lb ft).

3. Connect the oxygen sensor electrical connector (1).
4. Install the CPA retainer.
5. Lower the vehicle.