Need Ya!Check valve??
 

Just Bought my 03' B6. CEL is on. Fault code P0444, EVAP concern.

Noticed that the check valve connected to module to the right of my air- intake was almost corroded. Could that possible have somthing to do with the rough idle when I come to a stop and after I start. Could this be apart of my concern. 70,000mi- Any thoughts or advice would be cool!

Love My Ride. Thanks!