A4skinny

I've done a little looking around but want some feedback b4 i start replacing hoses and bov etc..
my car is a 2003 a4Q 1.8t i am running a full gt2871r with a MBC and a dual port BOV the car is revo tuned with 440cc greentops. Recently i have been experiencing backfires sometimes while the turbo is spooling but mostly while either the waste gate is emptying or the bov is evacuating not sure wich one exactly. here are the code i keep pulling any feedback would be appreciated. thx

VAG-COM Version: Release 607.2-UD

Control Module Part Number: 8E0 909 518 AF
Component and/or Version: 1.8L R4/5VT G 0003
Software Coding: 0016701
Work Shop Code: WSC 80180
4 Faults Found:
16622 - Manifold Pressure / Boost Sensor (G31): Signal too High
P0238 - 001 - Upper Limit Exceeded - MIL ON
16490 - Manifold / Barometric Pressure Sensor (G71) / (F96): Implausible Signal
P0106 - 008 - Implausible Signal - MIL ON
17743 - Engine Torque Monitor 2: Control Limit Exceeded
P1335 - 008 - Implausible Signal - Intermittent
16618 - Boost Pressure Regulation: Limit Exceeded (Overboost Condition)
P0234 - 001 - Upper Limit Exceeded

Readiness: 0000 1100