Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2011 Ford Taurus AWD V6-3.5LFACTORY OEM SERVICE PROCEDURE
Catalyst Monitor Sensor
Catalyst Monitor Sensor
Removal and Installation
All sensors
1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Jacking and Lifting Service and Repair.
All sensors except the RH 3.5L Gasoline Turbocharged Direct Injection (GTDI) sensor
2. Disconnect the Catalyst Monitor Sensor (CMS) electrical connector.
RH 3.5L GTDI sensor
3. Disconnect the CMS electrical connector.
- Detach the wiring retainer from the rear engine roll restrictor bracket.
All sensors
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 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).
5. NOTE: Apply a light coat of anti-seize lubricant to the threads of the CMS.
To install, reverse the removal procedure.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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