Heated Oxygen Sensor Replacement - Bank 1 Sensor 2

Heated Oxygen Sensor Replacement - Bank 1 Sensor 2

Special Tools

J 39194-B Heated Oxygen Sensor Wrench

Removal Procedure

Caution: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution (Heated Oxygen Sensor Resistance Learn Reset Caution).





Caution: The oxygen sensor may be difficult to remove when the engine temperature is below 48°C (120°F). Excessive force may damage threads in the exhaust manifold or the exhaust pipe.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).
2. Remove the connector position assurance (CPA) retainer.
3. Disconnect the heated oxygen sensor (HO2S) electrical connector from the engine wiring harness electrical connector.
4. Remove the HO2S (3). Use the J 39194-B , if necessary.

Installation Procedure





Note: A special anti-seize compound is used on the HO2S 2 threads. The compound consists of graphite suspended in fluid and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the compound applied to the threads. If a sensor is removed from an engine and is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.

1. Coat the threads of the HO2S with anti-seize compound GM P/N 12377953 or equivalent, if necessary.

Caution: Refer to Fastener Caution (Fastener Caution).

2. Install the HO2S (3). Use the J 39194-B , if necessary.

Tighten the sensor to 42 Nm (31 lb ft).

3. Connect the HO2S electrical connector to the engine wiring harness electrical connector.
4. Install the CPA retainer (1).
5. Lower the vehicle.