was something removed or replacement done? if yes check if the ground (-) was removed the fuel pump doesnt run when the pressure in the system is full it can only run when you crank the engine...
problem is on air leakages on intake manifold, but airflow sensor or dirty and no ground on fuel injector nozzles.
What makes you think it's a fuse ? Most all lights on newer vehicles are controlled by a computer - a BCM - body control module . Your best bet , take it to a qualified repair . Besides , fuse's don't just go bad . They are located on the positive side of electrical circuits to protect from short circuits . If a fuse is blown you have more problems then your going to want . So if you don't know how to test automotive electrical circuits ,viewing wiring diagrams an testing with a DVOM - digital volt ohmmeter ,do yourself a favor an take it to a qualified repair shop. Free wiring diagrams here http://www.bbbind.com/free-tsb/ Enter vehicle info. year , make , model an engine . Under system click on lighting then under subsystem click on tail lamps . Click the search button then the blue link . Do the headlamps work ? Power to headlamp switch also turns on tail lamps . https://www.youtube.com/watch?v=efKoWifdcag
Most Santa Fe model from that year had traction control fitted as standard. Check the dashboard centre console. There will be a button marked like the attached image. Different car makers put them in different places. It could be anywhere from next to the gear stick to up high on the centre of the dashboard.
is this a new problem? Is the vehicle new to you?
Check the hinges and the bolts in the tailgate mounts. If they haven't moved the vehicle might have hit or been hit bending something.
If it's worrying you, take it to a bodywork specialist and they might be able to tell you why it's not level.
Is it a big difference? If not, it might be worth leaving it alone. Sorting it out could be simple or very expensive.