Evanescent66

Hopefully this post does not cross to too many others on a UK based forum...
Recently bought a 2014 A6 C7 S Line Black Edition. It has a few warning lights and warnings as added extras...bought a VCDS from UK agent of Ross Tech scanned, cleared those faults that would clear but am left with an interesting array of fault warnings....I did the usual easy checks like blown fuses but have not located anything like a smoking gun just yet....I work away from home so don't have any access to my new car except weekends ....been poring over the scan output all week and am starting to form the opinion that the ABS control module may have a bad connection or ground but may be way off the mark...
I have attached the scan for the experts to give their opinion or point me in the right direction if I am 'cold' ....in case the question comes up I am using version 19.6 .1 and data version 20190529 DS308.0 and as far as I can tell this is latest version....

Thanks up front for any help offered...

Mesquite77

Simple thing first, how old is your car's battery (one in the trunk?). If it is the original, start there. All kinds of weird things happen with these cars if battery gets weak, even though car still starts.

Evanescent66

I disconnected and then reseated the large block connector to the ABS unit and replaced the battery.
The faults all cleared for two days driving and then returned. Plan to put the battery on a charger overnight this week and see if this again clears the faults...then may lead me to believe that the battery charging is an issue.....if this does not clear the faults again I will take another look at the block connector to the ABS.
Happy to take any other suggestions you may have....known system shorts etc.
Ian

Evanescent66

I thought it would be worth following up on this for the benefit of anyone else facing this same issue.
Sensor 3B "cannot be reached" was the clue. Clever people pointed me over to J849 module under the sensor console. The nearest ground to this module is under the back seat. I cleaned this up and the issue was gone.
The lesson...check for a ground issue after the usual fuses and battery checks.