I had a VAGcom port fitted to my car 6 months ago and its causing me problems. For some unknown reason, the crankshaft sensor decides to stop working every now and again, 4th time in 6 months. My VAGcom is not addressing any of the codes and it is ****ing me off. I was left stranded this morning and had to take a day off work to try and get it sorted, still no joy. This never happened before the VAGcom port was fitted so I want to revert back. How do you do it? My car is a Mk2 20VT AGU Any help would be greatly appreciated