Hi guys hope someone here can help me, thought id treat myself to an audi last week and i love it but its generated a problem, I have a 2004 audi a6 fsi quattro 3.2, 92,000 miles, it drove like a dream the first few day then one day the eml came on and it feels/sounds rough at idle when started but as soon as any acceleration is applied it sounds great and smooth and drives like a dream, a friend scanned it for me and picked up 3 codes P2004 P0016 P0013 He also noticed that the inlet valve/flap was closing properly and still open a fraction? would this cause all three fault codes? or can anyone advise me if theres a common denominator between these three? thanks in advance