surging, bucking, stalling very scary . help ...

[m88vet]

Hi All this is my 1st post on this forum..
I Have a love hate relationship with my 2013 2.0 biturbo 8spd auto Amarok . always an electrical issue to deal with from sensors to door locks, egr etc . so now i have this issue to deal with ..... i love the amarok but i am close to ending our relationship after 3 years .
my symptoms are i start the Rok and drive could be 200m or 100m who knows at around 1500 rpm very light throttle light load... then whammo it starts to take off/ surge all by its self with no input from the driver. very scary..like a switch is turned on ....
it will surge buck then stall along with popping sounds from the turbos. starts back up fine and no warning lights.
plugged vcds in and no faults found with engine .

so i ran a turbocharger test from basic settings twice and got this fault once ( never by driving it though )


Address 01: Engine Labels: 03L-906-022-CFC.CLB
Control Module Part Number: 03L 906 012 AF HW: 03L 907 309 AC
Component and/or Version: R4 2,0L EDC X23 4433
Software Coding: 012A4012232600080001
Work Shop Code: WSC 07456 790 50316
ASAM Dataset: EV_ECM20BTD01103L906012AF 001008 (VN81)
ROD: EV_ECM20BTD01103L906012AF_001.rod
VCID: 68DE803C9373DA0622-803C
1 Fault Found:

11873 - Turbocharger Inlet Valve
P22D2 00 [032] - Stuck Open
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 114440 km
Date: 2096.14.30
Time: 20:50:35

Engine speed: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 68 °C
Intake air temperature: 37 °C
Ambient air pressure: 970 mbar
Voltage terminal 30: 12.500 V
Unlearning counter according OBD: 40
Actuator for low press turbocharger: activation: 11.18 %
Bypass valve f high press turboch turbine inlet: actual value: 7.14 %
Bypass valve f high press turboch turbine inlet: offset closed: 4.48 %
Bypass valve for high press turboch turbine inlet: activation: 95.00 %
Bypass valve for high press turboch turbine inlet: uncond volt: 3401.6 mV


Readiness: 0 0 0 0 X

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Address 01: DTCs cleared

i took the air filter box off and it had a white soot / smoke residue inside is this caused by the inlet valve being open when it should not be ?

has anyone had the fault code or experienced surging bucking popping stalling without input from the driver ??

i cannot drive the Rok as it is ..seems weird that no MIL or warning lights show up..

please help ! many thanks Richard