I think it thinks air is leaking into the tank through the cap.
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Purge valve!
Here's what I think happened. I didn't connect the purge valve hose quite correctly when I did the ccv. So that's why the gas cap light went on and off at first. The second mistake I made was that I ran the purge valve hose underneath the hose for the power steering reservoir. So eventually the weight from that completely disconnected it and the computer thought air was leaking through the gas cap. I only checked the hose connections once when the problem first came up. Obviously I didn't catch it.
Came across this diagram that helped me understand things:
Good write up too:
http://www.e46fanatics.com/forum/sho...php?p=14246795
Thanks the all the help, guys!
Sent from my iPhone
Has anybody else had gas cap light issues?
I had mine turn on again. I think I also had it in the beginning of the year. I'm not sure if I cleared it or it went off. I'll see if this one turns off by itself. I'm pretty sure I closed the cap properly. Do the caps/gaskets on these usually go bad?
How do you get to it other than taking off the wheel?
Also is that the only part you replaced or was there also some hose?
What codes are you guys getting? I'm getting a P0444.
I haven't checked. The light disappeared. I'm not sure if that means the problem is gone or not severe enough.