Try to find someone with VAG-COM in your local area. You might be throwing "soft" codes. It would be cheaper than buying parts to see if that fixes it.
wrong. The software is free.a vag com isnt as common as you make it out to be, from what i know about it you need a dedicated lap top and about 1g to lay down just for the software (they have cheaper versions but the one that does it all is about a grand)