NHTSA Complaint #11480051 — 2016 HYUNDAI SONATA

In May 2022 after driving approximately 2.5 hours, when I turned off the vehicle and tried to restart, the Hybrid symbol "CHECK HYBRID SYSTEM", after waiting approximately 15 minutes to restart and it started. During this trip this happened several more times. I brought it in to a Auto Zone and he could not diagnose because the light was not appearing. The check engine light also was on but just disappeared. Once I returned from my trip, I brought the vehicle into a Hyundai dealership for diagnosis, however, they said since the lights nor the check engine lights were on, they could not diagnosis. In August 2022 I went on another long distance trip, and the same thing happened, after driving for approximately 2.5 hours and stopping, the vehicle would not restart and the same warning light displayed, "CHECK HYBRID SYSTEM". Again, I waited 15 minutes and the vehicle started, the check engine light remained on for a while and then disappeared. AGAIN, this happened several more times after driving for more than 2.5 hours.