I had the same issue with my 2011 Sonata, but my check engine light came on at the same time. Dealer had to replace some evaporation unit related to the gas tank. Bring it into your dealership, they will take care of it.

 

Yea, I remember reading something similar to this on another forum, it is definitely something to do with evap system.

 

This is usually caused by a clogged/kinked/damaged vent valve hose or bad solenoid. Sometimes an evap problem will set a code and turn on the check engine light, but not always. Take it to the dealer and let them figure it out.

 

I had a similar issue with my car. I can't remember the exact details, but IIRC there was some issue with a valve in the gas tank. The remedy was to replace the tank. Totally covered under warranty, and no issues since.

 

I actually have this same issue and about the same time this started happening, my "miles to empty" was affected as well....meaning, prior to this issue, the MTE would say 420 miles on average at fill up and now it is always around 375 MTE.

For the mechanical guys here, could this be a related issue?

 

yeah....keep your right foot out of it more often!!!!

 

Well I know when I had my SF in for service, they had to disconnect the battery and it reset my range to 297 miles to empty and I usually get it to read 320 after a fill so perhaps they had to disconnect power.

 

I've had this happen but only on certain overly sensitive gas pumps. The pump handle senses the back-pressure from the neck of the tank to shut off. The simple solution is to back the fill handle out of the tank an inch or two to let some of the air in the tank escape around it.

If it's happening on EVERY pump then I'd definitely check with the dealer about your tank venting.

 

I have two Sonatas and my SE had the problem. The dealer had to order some filter that is on the tank filler to filter gases etc. My GLS is now starting to do the same thing and I need to take it in to the dealer soon.

 

I have the same problem. Have you gotten it fix. If so could you please tell me what was the problem. Thanks!

 

I have this problem on and off, for me it's not the car, but the darn pump at the gas station is faulty. I pull up to the next one and it works just fine.

 

wtf 500 I'm only getting 422 if that
and i get around 30-35 all highway lol

 

My wife's Limited was not filling up easily. Dealer had to replace the tank, took about one day because they had to order it. They said they have noticed this problems on other 2011's. Problem is fixed after gas tank replacement.

 

This is a common issue in the Kia Optima's as well. I have a '11 Optima and the best way to get it full is to put the pump on the lowest setting. Doesn't take much longer but get's the tank full in my experience.

 

how do you think that miles until empty works just after a fill up? Ive noticed it resets MPG on each fill up, does it just use a previous avg or something?

mine use to read 484 until empty on every fill up for the past year. now it reads 459 after fill up. strange, wonder why it would change now?

only thing ive done is had a recent service. they did a transmission firmware recall of some sort, and the shift knob again.

 

and yes, ive had trouble with the pump shutting off before its really full at times, just use a lower notch on the pump to pump slower. seems to work

 

i know that this is an old post but I am getting the same problem with my 2011 SE ... it has 37k miles ... do you think this is still covered under warranty ?

 

Yes.