Removal Procedure

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

Fig 1: View Of HO2S 2
Courtesy of GENERAL MOTORS CORP.
1. Turn OFF the ignition.
2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Disconnect the sensor harness connector.
4. Use the J 39194-B  in order to carefully back out the heated oxygen sensor. See Special Tools .