i have the same codes for my 1.8t right now also plus P0422
i just bout a whole new complete timing belt kit, new head gasket, valve cover, intake and exhaust gaskets and since i have the head of the block my valves are pretty dirty and also the exhaust ports are really dirty i just finished cleaning the ports a few minutes ago and they look much better now... i wont exactly know if its the answer to my problem yet but don't have much of a choice since i took it to the dealer and they couldn't even scan it for any codes?? so i bout a alctron scanner for 75 bucks and it gave me 4 codes
i also tried the fuel filter, ICM, sparks, filters etc and my car still hesitated to pick up speed, not to mention my 1.8T was wasting petrol like a V12 R8!!!
but idk might be your valves & or dirty ports???