hey Scotty i have a 2007 Hyundai santa fe 3.3.. i have a code P0456 code coming up so i went out and got a gas cap from the dealership the code came back but werid part is i smell gas in my car every time i fill up to a full tank of gas and it very strong and get stronger when i drive but when it goes down to almost a half a tank the smell goes away.. please help me i have a 15 month old son that rides in the car with me and i cant keep having the windows down

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often a badevap cannister vent valves