What are the symptoms of a bad temperature sensor?

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asked Aug 12 in Other-Cars/Transportation by Coyerr (250 points)
What are the symptoms of a bad temperature sensor?

1 Answer

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answered Aug 19 by Niko (9,310 points)
A bad coolant temperature sensor can cause rough idle, hard starting, engine stalling, engine overheating and even black smoke can come out of the exhaust due to a bad coolant temperature sensor.

A bad coolant temperature sensor can also cause decrease in fuel mileage and your check engine light to come on.

A coolant temperature sensor tells the computer when the engine is warmed up or cooled down and adjusts the fuel to air mixture ratio for a proper running engine.

Having a properly working coolant temperature sensor is essential to a properly running engine.

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