Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 1

Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 1

Tools Required
J39194-B Oxygen Sensor Wrench

Removal Procedure
1. Raise the Cab.

NOTICE: Heated Oxygen and Oxygen Sensor Notice

2. Disconnect the connector (2) for the HO2S.
3. Remove the harness clip (1).

NOTICE: Excessive Force and Oxygen Sensor Notice

3. Remove the HO2S (3) using a J39194-B.






Installation Procedure

IMPORTANT: A special anti-seize compound is used on the 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 from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize compound applied before the reinstallation.

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

NOTICE: Service Precautions

2. Install the HO2S (3) using a J39194-B.

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

3. Connect the HO2S harness connector (2).
4. Install the harness clip (1).
4. Lower the Cab.