Hyundai Santa Fe P0303 = Cylinder Misfire
Seems like 2013, 2014, and the 2015 Hyundai santa fe has an issue with a cylinder misfire issue. It looks like its only taking effect with the Turbo engine. This topic has taken front and center on www.hyundai-forums.com and its constantly being bumped with new posts. take a look for yourself: http://www.hyundai-forums.com/dm-2013-santa-fe/326681-check-engine-light-code-p0303-%3D-cylinder-misfire.html
So far the only resolution that has come to light, is spark plugs being replaced, ecu's be reflashed with new software maps, and or coil's being replaced. If you have this issue, log into hyundai-forums.com and post your complain.