Power loss A3 1.9 TDI 2000

I have problems with the power of the engine of my A3, I have made a diagnosis and I of the following failure:
17958- Charge Pressure: Deviation control
P1550 - 35 -10 - - - Intermittent
someone would know how to tell me how I can find a manual of interpretation of failures, or diagnose that happens to him.
It could be the flowmeter, the car is suffered and does not pass in Llano of 150.

Hello, it is possible to the flow, try to clean the sensor with lubrilimp 0, but this is a temporary solution, that or can also be the agra.

According to the code that you put is a pressure of supercharging overcome. This is due to the turn And the engine stops, then you start it and if you go well you have the problem in the geometry of the turbo or in the supercharging electric valve.