Hyundai Sonata won't restart when warm, possible coil pack issue on Hyundai Sonata

Some Hyundai Sonata owners report experiencing issues with their vehicle not restarting when warm, which may be attributed to faulty coil packs. These problems can often be diagnosed by connecting an OBD-II scanner to retrieve trouble codes related to ignition coils, with the check engine light frequently indicating a potential issue. Symptoms of failing coil packs include engine misfires, rough idling, trouble accelerating, increased fuel consumption, and a noticeable fuel smell. While it is generally unnecessary to replace all ignition coils if only one is faulty, addressing the specific coil causing the misfire is recommended. Owners are advised to diagnose the problem promptly to ensure the vehicle's proper functioning.