A4 (B6 Platform) Discussion Discussion forum for the B6 Audi A4 produced from 2002-2005

problems after replacing coolant temp sensor

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Old Nov 14, 2014 | 07:51 PM
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Default problems after replacing coolant temp sensor

I replaced the sensor in my 04 1.8T tonight only to find the cooling fan running full blast once I started the car up. Did I do something wrong or get a bad sensor?
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Old Nov 17, 2014 | 09:08 AM
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Where did you get the sensor?
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Old Nov 17, 2014 | 12:23 PM
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Could be a faulty sensor. Typically it's recommended that you always replace sensors like that with OEM units.

I had a similar issue upon cold starts when my temp sensor was bad.

Jason
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Old Nov 22, 2014 | 09:37 PM
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Try disconnecting the battery to reset the ecm, that may help. I just replaced mine with an after market one, and it works properly.
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Old Nov 24, 2014 | 03:33 AM
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Apparently it fixed itself. The car wouldn't start. So I did some trick I found online and it started. CEL came on and I cleared it. Then it's been normal ever since.
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