Recent content by jal3

  1. J

    2011 A8 4.2, intermittent P0420 code

    So I've gotten this code twice in about two weeks now, wonder if anyone has had any experience or has any ideas on what could be going on. After I got the first time, I did the Mr. Gasket Cataclean treatment to start with the easy stuff, did not help. The car runs great. Se here's the fault...