I have a 2007 Santa Fe that is having gas guage problems. I can fill it and the guage might show full or it might show empty. After driving a little while it might show a different level entirely. I've laready tried disconnecting the negative terminal from the battery and that was no help. It's a 3.3L v6 AWD and has about 55,000 miles.. If anyone has any suggestions, I'd be glad to hear them. Thanks in advance.

 

2007 with 55,000 mile... why you goofing with it ?

Take it back and let dealer goof with it.

Replace both fuel level sensors,,,, so clean out the interior of the car, as back seats need to be moved to get at sensors on top of tank via service ports on floor.

 

^^^ Bingo. You are still under the 5y/60k mile warranty. Go back to the dealer and let them fix it for free.