Removal Procedure

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The Heated Oxygen Sensor (HO2S) and the Oxygen Sensor use a permanently attached pigtail and connector. Do not remove this pigtail from the Heated Oxygen Sensor. Damage or the removal of the pigtail or the connector could affect the proper operation of the sensor.
Take care when handling the HO2S and the O2S. Keep the in-line electrical connector and the louvered end free of grease, dirt, or other contaminants. Also avoid using cleaning solvents of any type. Do not drop the HO2S or the O2S. Do not roughly handle the HO2S or the O2S.

IMPORTANT: Bank 2 is the left bank.

Fig 1: View Of HO2S Electrical Connector - Replacement Bank 2, Sensor 1

Courtesy of GENERAL MOTORS CORP.

Turn the ignition OFF.
Remove the fuel injector sight shield, if necessary. Refer to Fuel Injector Sight Shield Replacement (LP1, LY7) or Fuel Injector Sight Shield Replacement (LLT) .
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
Disconnect the heated oxygen sensor (HO2S) electrical connector.
Remove the HO2S electrical connector from the wiring harness bracket.

Fig 2: View Of HO2S - Replacement Bank 2, Sensor 1

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Oxygen Sensor Notice .

IMPORTANT: Removal of the oxygen sensor is easier when the engine temperature is above 48°C (120°F).

Remove the HO2S.