VW Golf VI 1.6 TDI 105KM 2010 - Flashing glow plug + cruise control indicator

Hello.
I bought a VW Golf VI 1.6 TDI 105 horses from 2010 a month ago from a work colleague.
The mileage of the car is 120000 km and it is real.

For a few days I noticed that after starting a cold engine the car lost its power (slowly accelerating) after a short time everything was back to normal and the car was "pulling from the bottom". I thought it was supposed to be because "it was supposed to get hot" :)

Today, coming home from work, the situation was similar, but I had to accelerate sharply in 2nd gear, the revs slowly increased and I could feel the loss of power. The engine suddenly "lost" power during acceleration and there was a jerk, and at the same time the indicators showed on the clocks:

flashing glow plug indicator and at the same time the cruise control icon and the inscription "Err"
The car ran, but with less power. I stopped and turned off the engine. I fired it up and everything was back to normal...

I was looking for information on the Internet and many topics indicate a problem with the EGR or DPF.
I know that the previous owner had a problem with the EGR and replaced it with a used one.
The problem returned and he decided to blank the EGR and change the engine software to "remove" it.

Unfortunately, I don't have access to the diagnostic interface, I know it's a guess...
Maybe someone faced a similar problem?

The fairy had contact and if you do not have a tester, drive to the workshop where they have, after all, connecting the property does not cost. EGR removed, then the DPF will probably be clogged on the diagnostics.

I went to the mechanic today to read the error code and the error showed up:

P02990 Boost Pressure Regulation: Control Range Not Reached

So something with turbo control.
Today the problem has not recurred, no indicator lights are on, the car is driving normally but still after starting the cold engine it accelerates poorly, when it catches some temperature (about 1/4 of the indicator) it drives normally and pulls "from the bottom".

Someone something?

And apart from the errors, has anyone seen the condition of the dpf on this diagnostic?

Unfortunately, he did not check the DPF.
The mechanic suggested to me that the turbine control sensor 1K0906627B often fails.
I have no idea whether to replace it in the dark...