2011 Ford Transit Connect L4-2.0LFACTORY OEM SERVICE PROCEDURE

Catalyst Monitor Sensor




Catalyst Monitor Sensor

Factory service manual diagram




Factory service manual diagram




Removal and Installation

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Jacking and Lifting Service and Repair.

2. Disconnect the Catalyst Monitor Sensor (CMS) electrical connector and detach the wiring retainer.

Factory service manual diagram




3. Detach the 3 CMS wiring retainers.

Factory service manual diagram




4. 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 Nm (35 lb-ft).

Factory service manual diagram




5. 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.

Factory Service Tools

Use the Manual With the Right Hardware

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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