Help with 2 Engine Faults Please

[vk]

Hi everyone,

Am having trouble with my 2009 GT Sport TDI, the car has a 42DD intake & MAF de-grid, bluefin tune, and recently a straight pipe from the DPF back (removed the res and muffler).

Since doing the exhaust, I have been having a squiggly light popup, (had it once before), however the past week it has been coming up every single drive.

I just ran a scan with VCDS and came up with the following two faults on the engine, could anyone shed some light on these or do I need to go to a mechanic? (if so can anyone recommend someone that knows what they are doing on VW diesels in Melbourne?)

Address 01: Engine        Labels: 03G-906-018-BMN.clb
   Part No SW: 03G 906 018 FC    HW: 03G 906 018 FC
   Component: R4 2.0l PPD1.2 G    1879  
   Revision: --H52---    Serial number: VWX7Z0H23NVXXX
   Coding: 0000078
   Shop #: WSC 06441 785 00200
   VCID: 6BFB1A5C4A683B190A-803E

2 Faults Found:
005214 - Mass Air Flow during Regeneration too Low 
               P145E - 006 -  - Intermittent
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 5
                    Fault Frequency: 4
                    Reset counter: 38
                    Mileage: 140XXX km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 00:34:34

             Freeze Frame:
                    RPM: 2080 /min
                    Torque: 32.0 Nm
                    Speed: 105.0 km/h
                        0.00 %
                        11.31 %
                    Mass Air / Rev.: 321.6 mg/str
                    Mass Air / Rev.: 594.1 mg/str

012600 - Intake Manifold Runner Control 
               P3138 - 006 - Regulation Deviation - Intermittent - MIL ON
             Freeze Frame:
                    Fault Status: 10100001
                    Fault Priority: 5
                    Fault Frequency: 5
                    Reset counter: 40
                    Mileage: 140XXX km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 17:24:12

             Freeze Frame:
                    RPM: 2496 /min
                    Torque: 96.0 Nm
                    Speed: 97.0 km/h
                    Mass Air / Rev.: 436.0 mg/str
                    Mass Air / Rev.: 583.1 mg/str
                    Lambda: -21.9 %
                    Text: Kein Messwert verfuegbar

Readiness: N/A