Fault code 17964

[asohotra]

2004 Ford Galaxy 1.9 tdi - ASZ engine

I was driving back from work today when I noticed when I tried to accelerate the car was holding back then all of a sudden it accelerated really sharply. Did a VCDS scan and it came back with this.

Address 01: Engine        Labels: 038-906-019-AJM.lbl
Part No: 038 906 019 LD
Component: 1,9l R4 EDC G000SG  1595 
Coding: 00002
Shop #: WSC 00020 
VCID: 6492A485474BEDCA8B3-4B5C

1 Fault Found:
17964 - Charge Pressure Control
            P1556 - 35-10 - Negative Deviation - Intermittent
Readiness: 0 0 X X X

Any ideas what this could be any help would be appreciated.

[asohotra]

Forgot to mention no lights showing on the dash.

[johnnyroper]

Sticky turbo vanes or vac/n75 issue would be my guess.

[asohotra]

All sorted now split in vacuum pipe.