Has anyone experienced code 1456 after the diagnostic test? The first time this happened the dealer said they didn't see anything but a new gas cap might make a difference. I tried that but it later (6 months) came back on. I took it to the dealer again, they checked it for free this time after coming up with the same code but no answer. This past month Jiffy Lube reset it for free and it gave me the same code. It just went on - after being off for a week. Code is EVAP emission control system leak detected - this doesn't have anything to do with the EGR does it? I know there is an extended warranty on that. Can anyone shed any light on this?