Hyundai Elantra Reliability and Common Problems - In The Feb 16, 2021Engine Issues. The 2013 Hyundai Elantra is arguably the worst model year for this sedan. Going by the reports gathered by CarComplaints, many of its problems pertain to its engine. 2013 Elantra owners have complained about ticking noises and the engine failing outright. They also reported that the engine may run roughly, shake, vibrate, or Change Filament Klipper [O19L5Q] What is Klipper Filament Change. I found the problem: sometimes, when Klipper restarts, the primary extruder (T0) is not detected by Repetier Server, if you change the temperature from the extruder menu it reads "NaN".