Removal Procedure

Fig 1: Removing/Installing Heated Oxygen Sensor Bank 1 Sensor 1

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Bank 1 are cylinders 1, 3, and 5 which are closest to the front of the dash.

Turn the ignition OFF.
Disconnect the bank 1 heated oxygen sensor 1 harness connector.
Use liquid penetrant before removing the sensor.

CAUTION: Removal of the sensor is easier if the exhaust system is warmed up slightly. Be careful that it is not too hot to work on safely. Applying penetrating oil to the threads while moving the sensor back and forth will also aid in removal and will decrease the chance of exhaust pipe thread damage.

Remove the oxygen sensor using the J 39194-C .