Hi Guys

I have a question about the kk3
03L253016H turbo on the polo 6r 1.6tdi CR.
When I start the engine there is a excessive suction sound from the turbo inlet.
While driving it gets worse when there is boost.
Keep getting P0101 error
What can this be?
Things I checked:
1. Vacuum leaks none
2. N75 working 100%
3. Vnt actuator diagphram 100% keeps vacuum with manual
vacuum pump
4. Air filter changed just incase
5. Split exhaust to test if silenser is blocked
6. Vacuum reservoir keeps vacuum
7. Checked filter housing and pipes to turbo for cracks and leaks none found
8. Replaced new fhebi maf with a new continental maf
9. Checked all related wiring
Any ideas?