Did the engine start “ticking” about a week before? Mine (2013) did, then started stalling at deceleration. Once it stalled on the highway in motion (rush hour traffic luckily) I brought it in to the dealer. What my car has is a known problem. They’ve recalled Santa Fes and Sonatas but not Elantras. Google ‘Hyundai, Mitsubishi, Kia short block Recall’ for info but bring yours in right away. Mine is still under extended warranty but from what I understand, Hyundai will cover this problem regardless of warranty. Good luck!ive read several threads about this but they all kind of peter out without any solid answers. I have a 2015 elantra four door, runs fine cold, once warm it dies at idle, but starts right up again, doesnt struggle before or after, just dies. ideas please?