Question about 2004 Audi A4

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Audi A3 2002 model auto - temperature gauge not working

Hi all,
just bought an audi a3 2002 model and the temperature gauge is not working, any ideas on how to troubleshoot this ??

thanks in advance.

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  • cesarnz Aug 11, 2008

    ok found something interesting, while i was driving my car to a friends place in order to check out the suggestion you made i noticed the temp gauge which had been sitting on 60 deg. went up to the half way mark (90 deg) for about 10 minutes and then dropped back down to 60 !!!



  • gpina Oct 07, 2008

    I have a used 2003 A4 and the temperature sensor did not work at all. I replaced the temperature sensor and noticed the problem of the car running at 60 degrees, I put in new themostat thinking it was stuck open, problem is still there. If I drive the car and shut it off and start it the temperature guage will be at 90 degrees. If I drive the car on the open road the guage will drop to 60 degrees. The mechanic thinks now it might be softare problem where the variance is to small.

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How do I locate the sensor on a 2003 A4 1.8L? I see a blue sensor on the right by the firewall, and a green sensor on the left nearer to the battery on the left. Is it possible that I already have a green sensor in my car?

Posted on Nov 23, 2008

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Change the coolant temperature sensor. They're known problem areas on other Audi models, including my A4. The part runs about $20 from www.ecstuning.com and it's the problem probably 75% of the time. If that's not a fix, it could be a thermostat that is stuck open and causing the gauge to never read warm.

Posted on Aug 11, 2008

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I'm having the same problem and when I put it on the diagnostics it said that the Temperature gauge on the cluster isn't reading it or something like that. The thermostat and sensor are functioning properly, if they weren't the fan wouldn't turn on. I'm having problems finding the gauge, part of the cluster.

Posted on Jan 18, 2013

  • Elie Daher Jan 18, 2013

    I'm having the same problem and when I put it on the diagnostics it said that the Temperature gauge on the cluster isn't reading it or something like that. The thermostat and sensor are functioning properly, if they weren't the fan wouldn't turn on. I'm having problems finding the gauge, part of the cluster.

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