One problem related to check engine light on has been reported for the 2020 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2020 Hyundai Sonata based on all problems reported for the 2020 Sonata.
Vehicle rough idled & eventually shuddered to a stop. This happened four times while in gear and idling at appx 1000-1500 miles. Between 1500-2000 miles, vehicle shut down while driving appx 60mph on a county road. At appx 2700 miles, mpgs drastically impacted when vehicle suddenly stopped shifting gears properly while in motion at appx 70mph on the highway. Check engine light appeared with message regarding ecs issues. Vehicle still drives, it just seems to struggle with efficiency and shifting correctly.
| Car Stall problems | |
| Engine And Engine Cooling problems | |
| Check Engine Light On problems |