My daughter hasa 2002 Sonata V6 and has a problem that the dealer did not solve. It will not take more than 5 gals of fuel at one fill.time. This will happen for 4 to five weeks, meaning many stops to get fuel. It then will fill ok for a couple of weeks. At this time, she has gone for four weeks with having to add gas every day or every other day. Any idea's? In this particular probem, the fill pump shuts off and will not pump gas. If she goes to a different service station right away, it will only take a pint or less and shut off. At best, she will add 5 to 5.5 gals then drive that day and go tru the same problem.[:@]

 

Here's a couple of threads discussing the same problem with other Hyundais:

https://www.hyundaiforum.com/m_7227/tm.htm

https://www.hyundaiforum.com/m_11452/tm.htm