Engine coolant temperature sensor

I got a check-engine light on 96 Audi A6. It is Engine coolant temperature sensor error code. I measure the voltage of the sensor. It is 3.6V when engine is cold (~20C) and drop to 1.45V when the engine is hot(radiator fan starts running). Can I say the sensor is bad? What is the right voltage at cold and hot? Thanks in advance. _(&)

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• 就是一個熱敏電阻，一般不會壞 -追風大老虎- ♀ (31 bytes) () 04/06/2010 postreply 19:40:10

• go to Audi owner forum for the answer -fixanycars- ♀ (0 bytes) () 04/06/2010 postreply 19:51:45

• warm engine the voltage should be less than 1 Volt, -fixanycars- ♀ (0 bytes) () 04/06/2010 postreply 19:53:22