I have a 01.5 S4 that keeps getting the same codes..

P1136 and P1138

It means Long Term Fuel Trim Add.Fuel,Bank2 System too Lean and Long Term Fuel Trim Add.Fuel,Bank1 System too Lean
so I know now that is is not a o2 sensor.. I am guessing a vacuum leak from doing a search, anyone know the common places to check for vacuum leaks or anyone have any idea what is causing the code????

thanks..

 

yep ill go for the vacuum/air leak check the one under the intake manifold approx 1/2" in diameter and any other pipes

 

The leak was the 1/2 inch hose way in the back connected to the air intake... it was coming from the firewall... plugged it in and almost 100 miles and no code......