Guys, friend of mine has evo 10 EDM (53040007), the car is fitted with exhaust and was retuned. Everything was fine, but now the car throws following faults. Official dealers say that they dont have a clue and dont want to do anything about this problem , any suggestions what it could be ?

The biggest problem is when you reach 4000 revs and press full throttle, boost cut kicks in (or something similar). I looked at the logs and turbo boost up to 1.8+ bar even with stock rom loaded.

u 1417
c 1210
u 0100
c 1290 - fail safe mode (lost can data ACD/AIC)
u 0401
u 0431
o 0141 ETACs can time out
c 1618

I