I was helping a friend with their 2003 Toyota Matrix which had a CEL and so I read the code with my Auterra OBD scanner. The code came back P0441 - Evaporative Emission Control System Incorrect Purge Flow, which is a pretty vague code in my book. The little I found on the net about it usually had to do with kids hooking up their cold air intakes and getting the vacuum hose routing wrong. I guarantee my friend doesn't have a CAI on there so the only other common problem seems to be the gas cap. Anyone else own a Matrix or a Pontiac Vibe that got a similar code? What was the fix?
I just cleaned gas cap o-ring, sanded the filler neck smooth (1500 grit sandpaper) and cleared the code.
I guess we'll just need to wait and see if it comes back.