Re: Dash warning light...

[ti@amb.org (Ti Kan)]

John Cunningham writes:
> hmmm..., maybe the infamous A4 'loose gas cap' problem?  supposedly on some A4's
> if you don't screw the cap on all the way you'll get the light and have to go to
> the dealer to get it reset.  brilliant engineering on that one - guess Team DH
> is still on the payroll.

You know, I think that's a cheap shot at Audi's engineers.
Sometimes it's too easy to fault a particular design when you
might not understand all the parameters.

A loose gas cap constitutes an air leak in the fuel system, and in
today's stringent emission control systems, that can cause it to
operate outside of a precise range of tolerances.  The ECU has
no way of knowing where the leak is, it could be a real leak somewhere
in the system as opposed to just a loose cap.  So it is perfectly
reasonable to regard this as a fault event. This logs the event in
the fault memory and turns on the fault light.

-Ti
96 A4 2.8 quattro
84 5000S 2.1 turbo
80 4000 2.0
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