my 14 1500 has the same problem. took it to the dealer. paid for a hour of check out and had it smoke tested. found rodent damage to the vent line that goes to the purge valve. its not covered under warranty.$998.65 to fix it. the line is part of the fuel tank. so I took it home and I am going to splice the line with rubber hose to fix it. thank god I have a lift. it will make the job a lot easier.
Last week my daughter said her car wasn`t running well and the check engine light came on. I found the wire to the O2 sensor was completely chewed through in two places.
