200tq check engine light, but no codes!?

[Ti Kan]

Brett Dikeman writes:
> So, the general rule seems to be regardless of the vehicle in 
> question- pull the codes after a lengthy run, with the engine still 
> going, using a proper scan tool.  It's clear the jumper business is 
> really only for when something's seriously wrong.

This, of course, applies only to cars that have an interface to
a scan tool.  Earlier cars like the MC engine from the mid to late 80s
don't, and the only "diagnostic" is via the blink codes on the dash.

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
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