NHTSA Complaint #11328745 — 2017 HYUNDAI ELANTRA

THE ENGINE STARTED ROUGH IDLING PERIODICALLY (ONCE PER WEEK) AT THE BEGINNING OF THIS YEAR (2020). RESTARTING THE CAR WOULD USUALLY RESOLVE THE PROBLEM. IT WOULD USUALLY HAPPEN AFTER COMING TO A STOP AFTER HIGHWAY DRIVING. HOWEVER IT BEGAN HAPPENING WITH MORE FREQUENCY IN APRIL TO THE POINT THAT IT COULD HAPPEN MULTIPLE TIMES PER DAY. THE ISSUE CAME TO THE HEAD THE FIRST WEEK OF MAY WHEN THE CAR STALLED AFTER COMING TO A STOP AT A STREET LIGHT. THIS TIME IT WAS AFTER ONLY MINIMAL CITY-STREET DRIVING. I HAD TO SHIFT INTO PARK AND START THE CAR AGAIN, AFTER WHICH IT WORKED WITHOUT ISSUE. HOWEVER THE CHECK ENGINE LIGHT WAS ON. I TOOK THE CAR TO MY MECHANIC SAME DAY AND THEY SAID THE CODE INDICATED A MISFIRE. THEY REPLACED THE SPARK PLUGS AND THE IGNITION COIL FOR THE CYLINDER THAT MISFIRED. THE FREQUENCY OF THE ISSUE DECREASED SIGNIFICANTLY AFTER THIS REPAIR, BUT IT'S STILL ROUGH IDLING ABOUT ONCE PER WEEK. I DECIDED TO RESEARCH THE PROBLEM BEFORE HAVING MORE WORK DONE AND HAVE FOUND MANY SIMILAR COMPLAINTS. THE CAR HAS 41000 MILE ON IT.