CapeCodAudi

16826 EVAP emissions control syst small leak (sometimes intermit) P0442-35-10

16805 Warm up catalyst bank 1 effic below threshold P0421-35-10 (sometimes Intermit 70% of time)

i've tried searching but the solutions aren't there..HELP!!

quickaudi:STFA

1. could be return line leak to gas tank, loose gas cap, other stuff around gas tank

2. bad rear O2 sensor or bad cat

Vier Glühende Ringe

And your catalyst is covered for 8yrs/80k miles under federal emissions warranty if that is what is wrong with it. Most likely you do need a catalyst.