Grand Marquis V8-4.6L Flex Fuel (2010)
Oxygen Sensor: Service and Repair
Catalyst Monitor Sensor
Catalyst Monitor Sensor
Removal and Installation
1. WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in
Vehicle Jacking and Lifting. Failure to follow the instructions may result in serious personal injury.
With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Vehicle Jacking and Lifting.
2. Disconnect the Catalyst Monitor Sensor (CMS) electrical connector.
3. 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 CMS.
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Calculate the correct torque wrench setting for the following torque.
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To install, tighten to 40 Nm (30 lb-ft).
4. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and
procedures, refer to Vehicle Jacking and Lifting. Failure to follow these instructions may result in serious personal injury.
To install, reverse the removal procedure. If equipped with a fire suppression system, repower the system.
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Apply a light coat of anti-seize lubricant to the threads of the catalyst monitor sensor.
