In a 2006 Audi A8L, the same fault would have the same meaning. For example, in a 1993 Golf 2.0 ABA, if you got a fault 00532, VCDS would interpret that as 'Supply Voltage B+: Signal too Low' or something like that. Before UDS ('Unified Diagnostic Services'), Measuring Blocks used somewhat standardized numbers (like group 115 shows requested and actual boost pressure in many drive by wire gasoline engines) and fault codes had fairly consistent numbering. These first appeared circa 2008 in cars like the 8T/8K Audi A4/A5. This thread is intended to address frequent questions from customers about control modules that use the 'new' UDS/ ODX protocols. We can merge my stuff together with Jef's stuff to make a mad goulash with it: I made this draft post a while back but never 'published it'.
