hi i know there are thousands of threads on this but i dont know anyone who has sloved the issue? i have a x reg gt tdi and as everyone know when you get to 60mph+ it looses power and goes into limp mode and then fine after the ignition reset (off and then on)

i have tried several things mentioned in the forum
air flow sencor
vacuum pipes checked (worn but not with splits)
not the turbo like a few have mentioned (runs fine and doesnt smoke)

i think it maybe a sencor down, i know some people have had the exact same problem, can anyone diagnose the problem, i have heard alot of solutions but none that actually work
any help will be mostly appreciated!!

thanks in advance