Ok, I m new to the Audi. I have a 1998 A4 2WD 2.8L V6 (B5). I hear a vacuum sound coming out of the gas cap, the engine stalls sometimes while i get gas, there is idle droop at a red light sometimes. I got a OBD II reader and this is what came out.

Here are the Error Codes:
P0411
P0441
P1136
P1138
P0300
P0301
P0304

I looked up all the codes and still dont understand fully.No forum that I've been to gets to the point or tell how to fix the issues. PLEASE HELP!!! any little bit helps =I

 

By a quick over look this is what you got

1st quit putting gas in your car while its running

2 p0411 look for a vacuum leak in the engine bay

3 p1138 is usally caused by a bad mafs but can also be caused by a vacuum leak

4 p0411 vacuum leak

300 codes are misfires

Pop your hood remove the plastic engine cover with these codes the leaks should be obvious

 

P1136 17544 Long Term Fuel Trim Add. Fuel Bank 1 System too Lean

If this is correct, look for vacuum leaks.
Start with the L shaped formed hose on the back and side of the intake
manifold. Then check the Y shaped hose in back of the intake manifold.
Good luck

 

Its probably the hose off the fuel pressure regulator. Common break point on all vw/audi