Focus L4-2.3L VIN Z (2003)
Oxygen Sensor: Service and Repair
Catalyst Monitor Sensor
EGO Sensor Wrench
SPECIAL TOOL(S)
REMOVAL
1. Disconnect the battery ground cable.
2. With the vehicle in NEUTRAL, position it in a hoist.
3. Disconnect the Catalyst Monitor Sensor (CMS) electrical connector.
4. Using the special tool, remove the CMS.
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If necessary, lubricate the HO2S with penetrating and lock lubricant to assist in removal.
INSTALLATION
1. To install, reverse the removal procedure.
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Apply a light coat of anti-seize lubricant to the threads of the CMS.
