Well I mean the 3 byte Identifier given From UDS Service 0x19
Here a Log from SIMOS18:
4; ; STD ; 000007E0; 8; 03 19 02 2C 55 55 55 55 ; ...,UUUU
5; ; STD ; 000007E8; 8; 03 7F 19 78 AA AA AA AA ; ...x....
6; ; STD ; 000007E8; 8; 10 2B 59 02 FF 00 40 44 ; .+Y...@D
7; ; STD ; 000007E0; 8; 30 00 00 55 55 55 55 55 ; 0..UUUUU
8; ; STD ; 000007E8; 8; 21 20 00 43 1A 20 00 54 ; !..C...T
9; ; STD ; 000007E8; 8; 22 7E 20 00 4D 8E 20 00 ; "...M...
10; ; STD ; 000007E8; 8; 23 56 27 20 00 4D 9C 20 ; #V'..M..
11; ; STD ; 000007E8; 8; 24 00 4D 9E 20 00 4D A3 ; $.M...M.
12; ; STD ; 000007E8; 8; 25 20 00 54 98 20 00 4D ; %..T...M
13; ; STD ; 000007E8; 8; 26 A7 20 AA AA AA AA AA ; &.......
DTC's:
0x004044 Status 0x20
0x00431A Status 0x20
0x00547E Status 0x20
0x004D8E Status 0x20
0x005627 Status 0x20
0x004D9C Status 0x20
0x004D9E Status 0x20
0x004DA3 Status 0x20
0x005498 Status 0x20
0x004DA7 Status 0x20
Now there is a Table between the CAN-DTC-Error-Code and the VAG-Error-Code + Description
004044 -> U041600 - Invalid Data Received From Vehicle Dynamics Control Module
00431A -> U112300 -Databus error value received
00547E -> U016400 - Lost Communication With HVAC Control Module
004D8E -> U021200 - Lost Communication With Steering Column Control Module
005627 -> U013100 - Lost Communication With Power Steering Control Module
004D9C -> U015500 - Lost Communication With Instrument Panel Cluster (IPC) Control Module
004D9E -> U014600 - Lost Communication With Gateway "A"
004DA3 -> U012100 - Lost Communication With Anti-Lock Brake System (ABS) Control Module
005498 -> U100300 - Towing recognition control module No Communication
004DA7 -> U014000 - Lost Communication With Body Control Module