2009 fuel fill problem
 

I'm wondering if anyone else has encountered a problem with getting the gas tank full? If I wait to fill the fuel tank on my 2009 Accent until the low fuel warning light comes on (or anything below 1/4 tank, really) the tank doesn't seem to fill all the way. I always stop filling when the automatic shut off stops the fuel flow, but I've noticed that after the automatic shut off stops the fuel I get fuel that seems to come back up the filler pipe. It's almost like the tank is 'burping'. The fuel level indicator shows full but I definitely drive fewer miles (up to 30 fewer miles) before the guage starts moving downward. Just to see what would happen I've waited a bit at the pump and then topped off the tank a couple of times with as much as a gallon and a half of fuel. It doesn't seem to do this if I fill it sooner than below a 1/4 tank. Any suggestions?

SEARCH is your friend:
https://www.hyundaiforum.com/forum/h...iagnosis-5971/
https://www.hyundaiforum.com/forum/h...ting-off-3764/

I did search. Neither of those is describing the problem I am having. I have no problem in keeping the gas nozzle to stay on. It doesn't repeatedly shut off every few seconds. My problem is the 'backup' that occurs after the nozzle shuts off if I let the tank go below 1/4 tank. The needle show full, but there is definitely less gas in the tank than if I filled it when it got down to a 1/2 tank. There are less miles driven before the needle moves off of FULL. Now it could be that it's the start of the problem described in the threads you posted.

Have an appointment with the Hyundai Dealer on Wednesday. We'll see what they say.