Removal Procedure

WARNING: This page is about a different variant/trim than selected.

The heated oxygen sensor may be difficult to remove when engine temperature is below 48°C (120°F). Excessive force may damage threads in exhaust manifold or exhaust pipe.

Fig 1: Removing/Installing HO2S 1

Courtesy of GENERAL MOTORS CORP.

Disconnect the HO2S 1 harness connector.
Remove the HO2S 1 from the exhaust manifold.
Use the J 39194-B in order to carefully back out the heated oxygen sensor. See Special Tools .