Hey guys I have a AEB 1.8T B5 MT with a problem I can't solve. It threw a p1127 code today after 4 months of no CEL. At WOT it bucks heavy and won't let my car reach full boost (20psi on ko4. Pc16 with the correct injectors) i know it's not the tune because iv had it for about 5 years but iv replaced alot. Maf (2 times) fuel pump , fuel filter, both 02s , injectors, fpr , turbo , n75, spark plugs icm and coil packs. Still no change. Help 😣

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