Okay, this might be moved to MK5 section, but its more of a VAGCOM question.
Friends car was totalled nd she got a replacement MK5 1.4, and is getting around 400miles to £80 of fuel, but for first couple of weeks was getting more. She borrowed another friends VAGCOM and its so far read - knock sensor, catalytic convertor, and then CANBUS issues, but all of them only appear once?! Makes no sense as to why the faults are arriving and not reappearing...
any ideas?