air mass meter causes this and it wont store a fault for air mass,look in measured value block 32 anything above 10% INDICATES AIR LEAK HENCE LAMBDA REACTION TO FUELING.DONT ERASE THE FAULT MEMORY AS YOU WILL LOSE THE DATA IN MEASURED VALUE BLOCKS TO DETERMINE THE CAUSE
AudiWorld Forums: Fuel Trim Information (Running Rich or Lean?) EXPLANATION OF FUEL TRIM