Question about 2003 Audi A4 Cabriolet

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2003 audi a4 1.8t sedan temprature guage

I get in my car to go to gas station and get gas and when im driving back i notice that the temp gauge isnt reading. so whn i get back to house i check fual cap and its on and when i turn the power on the car on the guage will rise about a centimeter and stop still saying there is no temp any suggestions??

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  • davetremblet Nov 30, 2008

    are these easy to replace yourself?I have a audi a4 1.8 and the engine light is on. The mechanic tells me it needs a new coolant sensor.

  • Cdoggy911 Jan 05, 2009

    I have the exact same problem on my 2003 Audi A4. I failed my emmisions test because of this problem, so I ordered the part from Shucks. I now have the part, but I don't know how to change it or even how difficult it is? Any ideas anyone, I would rather not pay $50-$100 to have someone else do it if possible.


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You're talking about the coolant temperature right? If so, it's likely to be a coolant temp sensor. They're known to go bad on the A4, and they're only around $20-25 from If you replace it and the problem isn't fixed, no harm done - sooner or later that sensor WILL go bad. The result is that most likely your thermostat got stuck open and will need to be replaced.

Posted on Aug 31, 2008

  • Audi4 Jul 30, 2011

    Coolant fan is not running at all


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