O2 sensor 2341 code == vacuum leak

[YBK]

Thank you all who responded to my boost problems / 2341 error.

Using my compressor with a 3 inch adapter I pressurized the whole system with about .5 bar.

The discovery was shocking. There are 3 vacuum connectors on the back of the intake manifold. Air was leaking from all 3 hoses. After 2 hours all hoses/connectors were fixed and power is back to normal.

I did hear a quiet hissing sound from area near hydrolic pump. Could be an intercooler but that would have to wait until next timing belt job...