Removal Procedure

WARNING: This page is about a different car, the 2009 GMC Canyon and 2009 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: When replacing the HO2S perform the following:

A code clear with a scan tool, regardless of whether or not a DTC is set
HO2S heater resistance learn reset with a scan tool, where available

Perform the above in order to reset the HO2S resistance learned value and avoid possible HO2S failure.

CAUTION: Refer to Heated Oxygen and Oxygen Sensor Caution .

Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

Fig 1: View Of HO2S Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Disconnect the heated oxygen sensor (HO2S) electrical connector (3) from the engine wiring harness connector (1).

Fig 2: View Of HO2S

Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Excessive Force and Oxygen Sensor Caution .

Using the J 39194-B , remove the HO2S (1) from the catalytic converter.