Looking for some input on diagnosing an issue I’m having with my 2011 GTI. Currently it’s running a little rough on cold starts. Once it’s up to temp and I’ve driven a bit it feels and sounds fine. Doing some internet searches comes up with carbon build up but I had that done about 25,000 miles ago (2 years). Could it be that so soon? I have 2 codes but I’m not sure if it’s related. Intake Air System Leak (P2279) and System Too Lean At Idle, Bank 1 (P2187). I also have a small oil leak that I need to try and track down.