P0234 mysteries

naps45

Full member
Points
23
Location
Asheville
Car
2006 Audi 2.0 T FSI
2006 A3 2.0 FSiT 6spd

I was getting P0234 codes constantly (and limp mode as well) under moderate throttle (not necessarily WOT) with stage 1 IE tune. I flashed IE's stage 2 91 octane tune and no longer get P0234 fault codes.

My son thinks that it has to do with the difference between stg1/stg2 requested vs actual boost.
Narrower delta on the stage 2 tune.

Pretty sure I have "sticky vanes" in my turbo (my turbo has well over 100,000 miles on it)

I had done due diligence to find any hose leaks. But in the end, switching to stg2 tune seemed to stop the daily P0234 fault codes.

Anyone else dealing with P0234?
What are your findings/solutions?
 

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