Question about 2000 Audi A4
As far as your AC goes, if the high/low fan switch (under the hood) fails, it can keep your AC from blowing cold. The switch is cheap (I think I saw a price around $12 from www.ecstuning.com) and could be an easy fix. I have the same problem on my 99 A4 currently and am working on diagnosing it.
The P1128 code is often the MAF, but can also signify a vacuum leak. If you want to search out a leak, try this:
The other option of course, is to inspect your vacuum lines and look for any that are dry-rotted or cracked, or unplugged entirely, and replace any that are suspect. If you have another Audi A4 owner nearby who would allow you to swap the MAF from their car temporarily to diagnose your problem, that would help a lot.
I believe that you're going to have to use a code scanner (or ideally, VAGCOM - the VW and Audi diagnostic software) to reset the Check Engine light - most of the codes our cars throw aren't self-clearing. It may go out on its own, but you'll probably have to do it with a computer.
Posted on Jul 22, 2008
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