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Re: coolant temp sensor issues
Posted by Derek in Durham [Email] (more from Derek in Durham) on Mon, 17 May 2004 11:56:51
In Reply to: coolant temp sensor issues, Joseph, Mon, 17 May 2004 01:59:52
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Joseph: how do you know it is the coolant temp sensor and not a bad thermostat stuck open? Does the gauge "die out" instantly (suggesting an electrical or sensor issue) or does it move down a little bit slowly? I say this because getting up to highway speed > 80km/h would cause enough cooling with a bad thermostat to reduce the engine temp while it would come back up at slow speeds or at idle.
I don't think you can fix the sensor; just replace it. BTW, there are two such sensors. I think one goes to the ECU and the instrument panel and one is connected to the radiator fan.
I believe that it could affect fuel economy if the ECU adjusts, thinking that your engine is colder than it really is.
Derek / 1994 900 S V6 143,500mi
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