Gas cap

[Silver 2013]

I have a 2013 Ram 1500 5.7 Hemi. Been to the dealer 6 times with same problem. They have smoked the evap system 3 times. And said I need a new gas cap. They installed it. Resmoked system said all good. 2 weeks later same problem. Check engine light comes on, check fuel cap light on and the same 3 codes. Code U0140, P0456 and P0457. What gives?

 

[Wade Cunha]

I know this is an old thread but did you ever get this fixed? I have the same exact problem.