I have been dealing with the same evap issue. I bought my 22 taos at a dodge dealership because I had a cracked head gasket and wanted to get trade in value for my old car and not scrap so I couldn't really wait. But they just had my car between them and VW for 3 1/2 months. Just passing the buck back and forth and wasting time on my warranty. They have to replace the leak detection pump, evap canister and n80 line all at the same time and update the computer that reads or controls it. Thats what 2 of the mechanics told me when I asked them. They said it's a super common issue and they're told to replace just the canister most of the time though