And that was what I am wondering. I also wonder what the code would be on a leaking fuel cap. I don't think that is the issue I have been having the CEL come on with a P0420 code or VAGCOM 001056 code, but it does make me wonder.Not sure if my 2014 has a dedicated fuel cap light or not. I know some US market vehicles will throw a CEL for a gas cap warning. In those cases I believe the CEL clears itself once the cap is tightened.