C. E. L.

[Henry A Harper III]

The plenum-area drains can also get clogged with leaves & debris, and with
enough water it will come in through the HVAC ducts. If you had a wet carpet
after running the A/C a lot then there is a drip tray drain under the
evaporator that could be clogged. To get to the plenum drain, take off the
plenum cover (obviously! :) ) which will probably mean removing the molding
at the front edge to get to the metal clips underneath it, as well as the
wiper arms. The main drain is generally underneath the A/C receiver/drier,
it's about 3/4" and should have a rubber one-way-type valve in it which is
what gets plugged up. Root around in there with a suitable shopvac
attachment and perhaps poke a coathanger through the drain (gently). I think
weed-whacker cord is recommended for poking up the sunroof drains, I haven't
had any trouble with mine.

See http://www.sjmautotechnik.com to see how to read the blink codes for the
Check Engine Light (I didn't know there was one for "I'm wet, dry me out!")

HTH
Henry Harper
http://www.henry-harper.com hah at alumni.rice.edu
1991 200 quattro, 120k
1988 GTI 16v, 241k

> My car sat outside in the rain (with the windows and
> sunroof closed), and the RF footwell carpet got soaked.
> Now the check engine light comes on immediately
> when the car is started.  It seems to run fine, but I am
> concerned about the light.
>
> I will check the sunroof drains for debris, anywhere
> else should I look for a source of incoming rain water?
> It doesn't seem to leak when the car is washed, but
> when it is parked outside during a hard rain.