Hello Audi heads! So, one night my Audi started taking a HUGE s**t... It started spitting. I bought an OBD2 to check it. I have P0141, p0300, p0301 and p0302 codes showing. I don't know why.. there are no leaks, it was running just fine except for some weird transmission issues (separate case: if anyone can tell me why my drivetrain shakes at certain rpms and only occasionally, that would be awesome. I was told the clutch sensor switch, but.. I don't know. It gets pretty vicious too) and ran strong. I bought it used, the guy I bought it from said it just had the timing work done. I'm really just looking for "it could be's" so i can check them myself. Really, I just want to know if it actually is something I can do myself. I've been fearing a head gasket, but i don't know enough about engines to properly "eyeball" diagnose the issue.. I'm pretty sure my battery is dead right now, but, when the battery is charged the car wont stay running. I may have not put enough gas in it since my gauge doesn't work properly (doesn't read full tank and needle doesn't move till half tank)so I will check that first, but I had added fuel and it still was acting up. Anyone a master Audi technician?? lol ANY AND ALL HELP will be very much appreciated! thanks everyone! Oh yeah, its a 2005.5 S4 B7.. If that helps any.