2013 Hyundai Elantra, Sport Mode non responsive?
 

2013 Hyundai Elantra Limited 72k miles

Hey all, new to the forums. If I'm doing this incorrectly please excuse me. Anyways, I've looked all over the internet for a solution and I've been unable to find even the slightest clue of what could be wrong. So when I nudge the shift lever to the right into Sport mode (+/-) from Drive, the car still seems to behave as if it were still in Drive. On the dash, the [D] still shows and when I bump the shift lever up or down, it does nothing. 2nd owner, had the car since 52k miles, never been able to use it. It's not life or death, but I would love to utilize that feature. Any ideas or first steps I should take?