Ford Focus Quiz
Powertrain

Catalyst Monitor Sensor

In this manual: Powertrain
Vehicle - General — 4Accessories — 40Body — 237Chassis — 113Electrical — 19HVAC — 44Powertrain — 292
2steps
~17min
2/5difficulty
1special tools
0204060801004835N·mlb·ft
Tightening torque found on this page
Done 0 of 2
Special Tool(s)
Socket, Exhaust Gas Oxygen Sensor 303-476 (T94P-9472-A)

Material
Item Specification
High Temperature Nickel Anti-Seize Lubricant XL-2 ESE-M12A4-A
Penetrating and Lock Lubricant (US); Penetrating Fluid (Canada) XL-1 (US); CXC-51-A (Canada) —
Removal and Installation
  1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02.
  2. Disconnect the electrical connector and detach the wiring retainer.
  1. NOTE: If necessary, lubricate the sensor threads with penetrating and lock lubricant to assist in removal.

    Using the Exhaust Gas Oxygen Sensor Socket, remove the Catalyst Monitor Sensor (CMS) .

    • Calculate the correct torque wrench setting for the following torque. Refer to the Torque Wrench Adapter Formulas in the Appendix.
    • To install, tighten to 48 N·m.
  1. NOTICE: Make sure that the sensor wiring is routed away from hot surfaces and sharp edges or damage to the wiring may occur. NOTE:

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

    NOTE:

    Make sure that the electrical connector locking tab is engaged.

    To install, reverse the removal procedure.

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