What is diagnostic code P0456?
Year: 2004Make: HyundaiModel: XG350
That code is for a vapor leak in the fuel system. It can be cause by a loose or not dealing gas cap. Also several rubber lines going to the fuel tank so make sure none of these have a crack in them. It is a vapor leak so anything that will allow the pressure out of the tank will set off the code. It will not effect the way the car runs.
17 years experience, ASE certified, dealership certified, Service Manager for 15 years,