Would appear to be the VSS, £25 from Frauds or about £80 fitted, can be a PIA to fit as the pin breaks when removing, have been informed to pour a kettle of hot water over the box to make extraction easier.

try a self diagnostic check and see if you get any dtc codes.

Follow the instructions listed on the following thread
http://forum.ffoc.co.uk/forum/viewto...a2d4ea103559f0 613b893cda816e1e0d