When refueling my A4 2011 2.0T Quattro to full, the gas gauge never goes up to full. Sometimes it'll stick to where it last left off, sometimes it goes up, but not to full. Usually the next time I start the gauge will sit at zero, then flash a warming that says "Fuel Tank Malfunction: Contact Workshop". I had the car in a couple months ago, they replaced one of the fuel sender units and everything seemed to be fine. Then a couple months later the issue has come back again. Doing research this model has two units, so I could replace the other one and see if it fixes the issue, but also wanted to see if anyone else had this issue and if there is a better fix. I've tried fuel tank cleaner and pulling the fuses with no avail.
Thanks,
Matt