CTS RWD V6-3.6L (2008)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor Replacement - Bank 1 Sensor 1
Heated Oxygen Sensor Replacement - Bank 1 Sensor 1
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 bank.
1. Turn the ignition OFF.
2. Remove the fuel injector sight shield, if necessary. Refer to Fuel Injector Sight Shield Replacement (LP1, LY7) (See: Fuel Delivery and Air
Induction/Fuel Injector/Service and Repair/Fuel Injector Sight Shield Replacement (LY7) VIN 7 W/O Direct Fuel Injection)Fuel Injector Sight
Shield Replacement (LLT) (See: Fuel Delivery and Air Induction/Fuel Injector/Service and Repair/Fuel Injector Sight Shield Replacement (LLT)
VIN V W/ Direct Fuel Injection) .
3. Disconnect the heated oxygen sensor (HO2S) electrical connector.
4. Remove the HO2S electrical connector from the wiring harness bracket.
5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (See: Maintenance/Vehicle Lifting/Service and Repair) .
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).
