Heated Oxygen Sensor (Ho2S): Installation
WARNING: This page is about a different car, the 1996 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
When replacing HO2S, coat threads with anti-seize compound before installation. New sensors should already have this compound applied to threads. Install HO2S sensor. Reconnect wiring connector to HO2S. Reconnect negative battery terminal.