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Ford Repair/2004 Mercury Sable


I have a 04 Mercury Sable 103k miles.  Recently it feels like the car is not changing gears. So i thought it was the transmission.  I got a check engine code that reveals Coolant Temperature Sensor fault.  Would this cause a car from properly shifting?

I can help you better if you know the code. In extreme overheating instances yes the computer might change the shift patterns or restrict engine speed. A faulty coolant sensor might cause the same problems as overheating.

Update your question with the code(s)please if you can and we'll see where that leads us.  

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I am a retired Ford master tech specializing in electrical, climate control, emissions, driveability, chassis, brakes, and any light repairs. Cannot answer transmission, parts, or price questions, these are not areas of my expertise.


39 years of auto repair, diagnosis, and emissions testing, in service staions, independent garages, and 20 years with Ford dealers.

National Street Rod Association (NSRA)
International Automotive Technicians Network (IATN)
IAMAW (retired)

Riverside City College Automotive technology program
Ford Master Tech Certified Engine and Chassis Master (Over 500 hours)
ASE Certified in 7 categories
6 years training in Union 76 Pro-tech program

Awards and Honors
4-time Technician of the Year at Almaden Lincoln Mercury
Ford Master Tech
Union 76 Pro-tech Master tech

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