Has he overfilled the tank?
That is a common problem with the carbon canisters. I have been told it is very important on cars fitted with such systems not to try to keep filling after the first automatic cut off. That, of course, assumes you don't have a filler neck that cuts off the fuel every 2 seconds when you are filling the tank.
I have no idea if that particular code comes up when the carbon canister has raw fuel in it. Someone will probably come along soon who has had this problem.