Found a hole in one of the PCV hoses, also found the crank vent suction pump (the plastic Y) plugged (the side tube; 3rd one I replaced on various of my Audis).

Did seamfoam the intake through vac line, and sprayed TB as good as I can through the intake tube (MAF unplugged, corrugated intake hose removed).

Now showing code:


17514 - Oxygen (Lambda) Sensor; B2 S1
P1106 - 95-00 - Voltage too Low / Air Leak


Is that from the seafoam coating the O2 sensor? B2 S1 is upstream O2?

Will it go away or do i need to clean O2 (and how? burn with torch?)?

 

The code is still coming back.
O2 sensor (upstream or downstream; bank 2 is driver side/left side?)?
Or air leak?