my car will not take in gas at the pump -why

You more than likely have an emissions issue. not something that would leave you on the side of the road but an annoyance for state inspection and filling the tank. I would have to recommend a repair shop do a diagnostic to determine which part of that system needs replacement. Really rough idea on cost would be 2 to 4 hundred depending on parts. Hope that helps.

New vehicle - Return to dealer for assessment and 'warranty' repair.