CTS RWD V6-3.6L (2008)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor Replacement - Bank 1 Sensor 2
Heated Oxygen Sensor Replacement - Bank 1 Sensor 2
Removal Procedure
Notice: 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 1 is the right side.
1. Turn the ignition OFF.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (See: Maintenance/Vehicle Lifting/Service and Repair) .
3. Disconnect the heated oxygen sensor (HO2S) electrical connector.
4. Remove the HO2S wiring harness from the transmission case.
Notice: Refer to Oxygen Sensor Notice (See: Service Precautions/Oxygen Sensor Notice) .
Important: Removal of the oxygen sensor is easier when the engine temperature is above 48°C (120°F).
5. Remove the HO2S.
Installation Procedure