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2002 A4 1.8T codes don't know where to start.

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Old Dec 14, 2016 | 09:15 PM
  #1  
Talonf55's Avatar
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Default 2002 A4 1.8T codes don't know where to start.

Hey guys,
Just purchased a 02 B6 turbo. I got the check engine light checked out and all these codes came up. I want to take care of them one by one. But what's the most important to take care of first. The guy I bought it from said it needed a new turbo, which isn't an issue because I have a donor car for the parts. It seems to me the turbo is fine but I've only driven it 3 miles doing 25-30mph max. Do any of these codes indicate a bad turbo? Any input is appreciated. Thanks
 
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Old Dec 15, 2016 | 12:39 PM
  #2  
sheldon's Avatar
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From: Colorado
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All these errors indicate electrical issues of some sort - I would not start throwing parts at it yet. Here is what I would check:
* Wiring. There are a lot of short/open circuit errors. Bad/melted wiring will certainly cause that --> However I would not except the car to drive or act "normal" if wiring is the issue
* Move on to the computer and have that one checked --> again car should not act normal if that's case
* Sometimes the car will act really funny and throw a bunch of codes is someone
monkeyed around with the battery (mixed negative with positive terminal for example).
--Not necessarily in that order--
Clear all codes with something better than an autozone scanner (VAG-COM is a good choice) and see how the car drives and what new codes you get after a short trip.

How is the car behaving? You said it drives which if all those codes would be valid should not even start.
 
Old Dec 15, 2016 | 04:05 PM
  #3  
Talonf55's Avatar
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Default Everything just went wrong today.

Ok. So I started the car. Let it run for 20 mins. Drove it for 20 mins no Problem at all. I come back home. Turn the car off for a couple of minutes went back started car. No issues. Drove 100ft car starts to jerk then cuts off. Damn. So I start it back up EPC light came on. And was sputtering and jerking like crazy. So I Rev the engine to balance everything out which it did for about 2 miles. Then that's all it started doing revving high and low with the turbo sound being in sync with the revving. On top of that little to no pressure from the gas pedal. So I'm sputtering up the block revving high and low going max 10mph. Now here's the thing as well I went down a hill on the way home and I eventually picked up some speed and when I shift to 2nd and 3rd it caught on but I was on side streets so I couldn't maintain that speed for long but it felt like if I did it wouldve driven decently. So I get home eventually. Turn the car off for a while started it again. It idled fine but zero gas pressure. I step on the pedal and nothing. So I have the check engine light the ESP and EPC on. Help.
 
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