Malibu L4-2.2L VIN F (2005)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor (HO2S) Replacement (Post-Catalyst)
HEATED OXYGEN SENSOR (HO2S) REPLACEMENT (POST-CATALYST)
TOOLS REQUIRED
J 39194-C Oxygen Sensor Wrench
REMOVAL PROCEDURE
1. Raise and support the vehicle. Refer to Vehicle Lifting.
NOTE: Refer to Heated Oxygen Sensor (HO2S) Resistance Learn Reset Notice in Service Precautions.
2. Note the routing of the heated oxygen sensor (HO2S) electrical harness (2).
3. Disconnect the HO2S electrical connector in the engine compartment (1).
4. Using the J 39194 carefully remove the HO2S.
5. Lower the HO2S electrical harness away from the underbody (1).
NOTE: Refer to Heated Oxygen and Oxygen Sensor Notice in Service Precautions.
INSTALLATION PROCEDURE
IMPORTANT: A special anti-seize compound is used on the HO2S threads. The compound consists of a liquid graphite and glass beads. The
graphite will burn away but the glass beads will remain, making the sensor easier to remove. New or service sensors already have the compound
applied to the threads. If the sensor is removed and is to be reinstalled, the threads must be coated with an anti-seize compound before reinstallation.
