EVAP P0440 Error - vacuum piping, parts & solutions for Audi TT Mk2, A3 and VW Golf, Passat, Jetta

This common error seems to stump a lot of owners. P0441/001089 - EVAP Emission Control Sys: Incorrect Flow There are a few main components to check. While this is not a detailed DIY guide like my usual style it will give a quick overview of where to look, what to change, and their schematics. I&had this issue before. I fixed everything in the order i&recommended and no longer have the error ;) Part numbers are listed below: Charcoal canister - 1K0201797AE 3.2 Purge Valve - 058133517B 2.0 Purge Valve - 06E906517A One way check valve - 06F133781L 2.0 Vacuum system Hope that helps and let me know how you go!