This happened a while ago, but I keep forgetting to put the pics on my computer. On the day I was driving home from getting my windows tinted, I heard several chimes while I was driving on the interstate. This error screen came up:
Error screen (http://picasaweb.google.com/mbrowning/Error/photo#5177046506162180290)

What's weird is that I didn't even have the A/C running at the time, and when I tested the A/C it seemed fine.

I cleared the error message from the Error History screen:
Main menu showing Error History button (http://picasaweb.google.com/mbrowning/Error/photo#5177046514752114898)

The error never came up again and the A/C has continued to operate fine. I'm guessing it was just some sort of fluke.. maybe a drop of water got on a sensor somewhere or something? :dunno:

Since I can't tell that anything bad actually happened, I think I'm just going to wait until my first oil change to bring it up (assuming it doesn't happen again) unless anyone else thinks I should get it checked sooner?

BTW, there are some neat things to play around with in the Diag menu.. too bad I don't know how to get there without an "error" happening first.