Removal Procedure

WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The Heated Oxygen Sensors each use a permanently attached pigtail and connector. This pigtail should not be removed from the heated oxygen sensor. Damage or removal of the pigtail or connector could affect proper operation of the heated oxygen sensor.

IMPORTANT: Take care when handling the rear heated oxygen sensor (HO2S 2). The in-line connector and louvered end must be kept free of grease, dirt or other contaminants. Avoid using cleaning solvents of any type. DO NOT drop or roughly handle the HO2S 2.

Turn OFF the ignition.
Disconnect the HO2S 2 connector, in the Engine Compartment.

Fig 1: View Of HO2S 2
Courtesy of GENERAL MOTORS CORP.
Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
NOTE: The use of excessive force may damage the threads in the exhaust manifold/pipe.
Carefully remove the HO2S 2.