A friend read mine the other day. Can't remember if it was a PO442 or PO447.
It all started my display and chime going off and a picture of the gas cap by the car.
Checked the cap and of course it was fine.
The it sets a code and the SES light is on.
Someone mentioned that topping off my tank when fueling can cause it to overflow into the charcoal canister.
I can't believe they would make such a stupid design like that, but if this is the case, ya think they'd warranty it?