Soutram

When I had it refilled they plugged it in & reset it all so it should know it’s full. I taken it back a couple of times & they have even drained it and checked to make sure nothing is broken but it’s not solved it

I have a 2010 sharan which has the old version of the adblue system. A while ago when I drove 30 miles or so a light came on, I had it fault read & it said addictive tank empty so I had it filled up, the light is continuing to come on despite the tank bring full & now it comes on after 9 or so miles. Do any of you know what might be the problem? thanks