A2 stalling problems and EPC light

C

chouda

Member
Hi, firstly a grand job on the forums here. I am new here but have had an a2 for a few years. I have a question that you all maybe able to advise,

The car

a2, 2001, Manual, 1.4 SE, 70K

The problem

-EPC constantly on (for the last year or so)
-Engine stalling coming to standstill 50% of the time
-No other known problems, drives superb and reliability impeccable

I have taken the car to a local AUDI specialist who has plugged in a computer and reported the following codes,

16407
17604
17591
17588

The garage advised that further diagnostic investigation required before they can be certain what the problem is. Initially they stated that the engine ECU needed to be replaced. This 'may' fix the problem, however there is a chance it may not.

On another thread I read http://www.a2oc.net/forum/showthread.php?t=10252 , the problems seem the same as mine, however a totally different replacement of parts has resolved the issues!

I really need guidance as what is the most likely course of action, with minimal cost that will get rid of what is now a niggly and annoying problem.!

Thanks in advance and greatly apreciated.
 
Hi and welcome,

As well as a lambda fault (probably pre-cat), the first code listed tells me that you have a fault in the intake side of the engine.

Check the intake system for splits or leaks and also the EGR valve for sticking. Also, double check that the vacuum pump for the servo lines is working correctly - I've read up on Polo threads where a faulty suction pump jet was the cause.

Cheers,

Mike
 
thoughts on fix

Hi, thanks for the quick response.

Is it advisable/possible to resolve some of these issues by a user? (I am technically minded and can follow instructions, but no mechanic!)

1 - Replacement Lambda sensor approx £60 (with the right tools is this user replaceable)

2 - Fault with the intake side of engine, I guess this one is really for a competent mechanic/garage?

3 - Intake system (i will have a go checking this myself)

4 -EGR valve, i could check this myself?

5 - ok, i think this is all getting complex!

.....perhaps i should leave this one to the experts!
 
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