MMT jerking at low speeds.

[silva1kr]

Hi all, got a 2011 C1 (same car as the aygo, citroen owners club wasn't much help) which developed a problem in first and reverse gear recently at extremely low speeds. With no pedals pressed and the car 'creeping', it jerks quite badly, making it quite a hoohaa to park without looking like a learner. It never did this before and its something that's developed fairly recently. Using techstream and a VCI cable, I've already scanned for fault codes. Two codes came up: P0900 Clutch Acuator Circuit (Hist), and C1541 Vehicle Speed Signal (Current).

Cleared the P0900 code and drove it for a few days, rescanned, and the code has not reappeared. Not cleared the other one because it comes up as current. 

Is this whole problem just down to a calibration issue? If it is could someone outline the EXACT procedure for doing this in my car's current drivable state? I have not changed any part of the gearbox mechanism including the acuator. All procedures I have found seem to be unclear about the steps before the calibration. I'd rather get it right first time rather than ending up with a car that doesn't drive at all. The car drives bang on in every other gear and the clutch still pulls well at 101000 miles. Its just the problems outlined that let it down. Thanks for all your help.