He's using VCDS/vag com not ODIS.
It is now available from the likes of eBay but is still **** slow and a pain to use.
VAS-PC and VCDS make a far better combo.
As for the faults is see if you can remove the functions in long
coding helper. If it's flagging a fault with a component you know you don't have installed then remove it from the
coding and the fault should erase.