Removal (HO2S 2 - 2.2L)
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Turn off the ignition. HO2S 2 is located behind catalytic converter. Raise and support vehicle. Disconnect the HO2S electrical connector. Remove the sensor harness clip from the heat shield attachment. Use a liquid penetrate before removing the sensor. Using Heated Oxygen Sensor Wrench (J39194C), remove the HO2S from the exhaust.