Afternoon,
I've got an RS6 C7, recently bought. The engine light has come on (yellow) and the OBD shows error code P2196. It's the second time it's appeared both times after filling the car with fuel. I understand that it could be caused by an 02 sensor. I reset it to see it would come on again. Car ran 350-400 miles, I refuelled it and it's come back on again. Anyone come across this?