Friday afternoon, my MIL light stayed on after start up. (wasn't on the in the am before driving to work). I took a quick look at the air filter, maf connection and gas cap to see if maybe it was something simple, but to no avail. When I started the caragain, I noticed it smells like it's running extremely rich.

Went to Autozone near my place to have the codes pulled. The two guys there (who looked likethey've spent many a weekend watchingGrave Digger and Big Foot battle it out at the local fair), said they didn't do that. So, I'm stuck without codes until I get to the dealer.

Any ideas as to what would cause it to run so rich all of the sudden and trigger the MIL?

Thanks!