Loose wire perhaps
OK, if the front lights check out, then I'm going there next. But how can you tell if it's an LED driver (do you mean ballast?), and how can you tell which one, if both sides are working?
Yes, I do mean the ballast for the LED's. I found that when the message appeared that the bad LED side actually went off and the turn indicator came on on the bad side.
You can swap the LED ballasts and see if the problem moves with the bad one. I will tell you that my ballast ended up NOT being bad. The wiring that goes into the socket that pugs into the ballast had a loose wire.
Perhaps Umitza(LED supplier) can give us some help with securing the wires in the socket.
Your problem may in fact be a loose wire if the agel eyes are not going off. Does the message come and go over time? If so, it is most likely the loose wire issue. I still would be willing to guess that one of your sockets has a loose wire, but just a slightly loose wire.
There are four wires into the socket. The red wire is what cause all of my issues.