Bariukas

Hello guys, I have 2013 Audi A6. Had 0 problem with the car so far.....
Just couple days ago "acc and audi brake guard unavailable" poped up and keeps showing up every few seconds.

Here is attached autoscan for all the codes.

Thanks for help

Ashtrom

I got the same issue, except I haven’t done a scan yet, but symptoms are identical. PLEASE, PLEASE, PLEASE, if you do find a solution could you post here.

I did lots of reading about it today, and here’s what I have found so far:
it could be as simple as brake light switch,
or more severe bad wiring somewhere (few posts have pointed to a wiring next to ABS control module).
and few pointed that rebuilding their ABS control modules have fixed the issue.
Most of those I have found about A3, A4, A5, older A6, A8. Not one have I found about A6C7. I’m eager to find out what people have found as a solutions.

My wife drove a car today and said that Steering wheel looking light came on. Power Steering light I guess. It’s probably related to the issue with ESP.

Ashtrom

I just remembered that somewhere I read about the heat from exhaust manifold that gets to a ABS control module. And come to think about it, It does make sense. My ESP Fault never comes up at cold start, it only comes up after some driving, and usually on a hot days it comes up quicker. That will be a first thing I’ll look at solving. Maybe I’ll try to install some type of heat shield around ABS module and maybe will try to put in some type of a pipe to cool it. Something like air intake for ABS module. As ridiculous it sounds if the heat is an issue here that might be a good solution for it. I’ll post here once I’ll try something out, unfortunately I won’t get to it until sometime next week.

laurent0613

5F your gps antenna is the cause.
ACC is using gps as secondary speed reference via 8E
13 and 8b are deactivated because of your antenna.

btw you have 1 recall and a service campaign on your vin.
Audi Recall Services by Vehicle Identification Number

Ashtrom

From Everything I have read so far that’s a first time I’m hearing that GPS antenna could be the problem. Do we know how to fix it?
Thanks

omlilleby

Have had the same problem on my allroad 2013, change the gps antenna.