Removal and Installation

WARNING: This page is about a different car, the 2006 Mercury Milan and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to JACKING & LIFTING .
Disconnect the catalyst monitor sensor (CMS) electrical connector.

NOTE: If necessary, lubricate the sensor threads with penetrating and lock lubricant to assist in removal.

Using the special tool, remove the CMS.
- To install tighten to 48 Nm (35 lb-ft).
  
  Fig 1: Identifying Heated Oxygen Sensor (HO2S) Electrical Connector And Special Tool
  Courtesy of FORD MOTOR CO.

NOTE: Apply a light coat of anti-seize lubricant to the threads of the CMS.

To install, reverse the removal procedure.