Greetings, just posting my experience in case it helps anyone.
My Skoda Superb (2015-Mk3 L&K 2.0 190PS DSG) developed this fault on my way home last Friday. I think I last topped up the AdBlue with about 6 litres in December and should have had at least 5000 miles to go. Suddenly the alert came on stating I had only 600 miles left. I had about 4 litres left at home so I topped up some more but it didn't register at all on the system. Started to panic because I had a couple of long journeys over the weekend. I took the car to my nearest Skoda dealer and they said it might have been me topping up with small amounts (but then why would it take 4 weeks to show up as an error??). I left the car with them yesterday and they drained the system off then ran it through some tests for an hour. I'm glad to say that so far everything is working perfectly, the work was done for free including the Adblue and a free car wash! All I need to worry about now is what to do in 8000 miles time (probably will fill it with a minimum of 10 litres)
