So I started up my car today and got my brake light flashing, ABS light stuck on, and my ESP light on as well. It's happened before but ended up turning off after an hour or two of not having car on. Decided to go to a movie with the wife and when I got back in the car, the lights were still on. Got home and hooked up my car to my laptop, and found 4 new errors showing. Here is my Auto-Scan report

*************************************
VCDS-Lite Version: Release 1.2
Thursday, 15 May 2014, 22:21:11.


Chassis Type: 4B - Audi A6 C5
Scan: 01,02,03,06,08,15,16,17,18,22,34,35,36,37,45,55,56 ,57,65,67,75,76,77

-------------------------------------------------------------------------------
Address 01: Engine Labels: 06C-909-559-ASN.LBL
Controller: 8E0 909 559 D
Component: 3.0L V6/5V G 0004
Coding: 0016752
Shop #: WSC 02325
VCID: 361FA5DB015F
2 Faults Found:
16815 - Warm Up Catalyst; Bank 2: Efficiency Below Threshold
P0431 - 001 - Upper Limit Exceeded
16805 - Shareware Version. To Decode all DTCs
P0421 - 001 - Please Register/Activate
Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 02: Auto Trans Labels: 01V-927-156.LBL
Controller: 4B0 927 156 DE
Component: AG5 01V 3.0l5V USA 0809
Coding: 0001002
Shop #: WSC 02325
VCID: 6DAD4AB73489
3 Faults Found:
18227 - Pressure Control Valve 2 (N216): Open or Short to Ground
P1819 - 003 - Mechanical Failure - Intermittent
18232 - Shareware Version. To Decode all DTCs
P1824 - 003 - Please Register/Activate - Intermittent
18222 - Shareware Version. To Decode all DTCs
P1814 - 003 - Please Register/Activate - Intermittent

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 4B0-614-517.LBL
Controller: 4B0 614 517 R
Component: ABS/ESP allrad 2330
Coding: 06497
Shop #: WSC 02325
VCID: 301393C3E33B
1 Fault Found:
01200 - ABS Valves Supply Voltage
35-00 - -

********************************

The 16815 and 16805 error's have been there and aren't worried about those. I am, but I'm curious about what would cause the new four errors to come on all at the same time. I would have thought they would have come on at different times, but with coming on at the same time, has me wondering/scared. Any ideas?

 

If you google the error code and ross tech (e.g. 18222 ross tech), you will get not only the diagnosis but also some possible solutions.