Heated Oxygen Sensor Replacement - Bank 1 Sensor 1

HEATED OXYGEN SENSOR REPLACEMENT - BANK 1 SENSOR 1

REMOVAL PROCEDURE




1. Turn the ignition OFF.
2. Remove the fuel injector sight shield, if necessary.
3. Disconnect the heated oxygen sensor (HO2S) electrical connector.
4. Remove the HO2S electrical connector from the wiring harness bracket.
5. Raise and support the vehicle. Refer to Vehicle Lifting.




6. Remove the HO2S from the catalytic converter.

NOTE: Refer to Oxygen Sensor Notice in Service Precautions.

IMPORTANT: Removal of the oxygen sensor is easier when the engine temperature is above 48°C (120°F).

INSTALLATION PROCEDURE




1. Install the HO2S to the catalytic converter.

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

IMPORTANT: New oxygen sensors should have a special anti-seize compound already applied to the sensor threads. If you are installing the original sensor, apply anti-seize compound GM P/N 5613695 or equivalent to the sensor threads.

Tighten the HO2S to 40 N.m (30 lb ft).

2. Lower the vehicle.




3. Install the HO2S electrical connector to the wiring harness bracket.
4. Connect the HO2S electrical connector.
5. Install the fuel injector sight shield, if necessary.