Removal Procedure

CAUTION: Handle the oxygen sensors carefully in order to prevent damage to the component. Keep the electrical connector and the exhaust inlet end free of contaminants. Do not use cleaning solvents on the sensor. Do not drop or mishandle the sensor.

CAUTION: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution .

NOTE: Remove the heated oxygen sensors (HO2S) with the engine temperature above 48°C (120°F). Otherwise the HO2S may be difficult to remove.

Fig 1: HO2S Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Remove the oxygen sensor wiring harness heat shield. Refer to Oxygen Sensor Wiring Harness Heat Shield Replacement .
Disconnect the engine harness electrical connector from the heated oxygen sensor (HO2S).

Fig 2: HO2S

Courtesy of GENERAL MOTORS CORP.

Remove the HO2S.