2020 Hyundai Sonata Engine Problems

“My car stalled and stuttered between 1000 and 1500 miles in traffic and couldn't get it into gear once started. It was the fuel rail sensor. Now at 6000 miles did same thing. If sits for bit works again. It also reset itself and I lost all preprogrammed information. The gas door also opens at times when unlock driver door. The dealership had it the first time for over 30 days and had to contact engineers to fix it.”

“Vehicle abruptly stopped in a traffic signal without giving any indications what so ever. When tried to restart it stalled pretty badly causing excessive vibrations. This had just 1900 miles on it. Vehicle didn't have any mil or any visible information about the issue. It created a huge traffic pile up due to the peak hour in which this problem started. Few days ago there was issue with starting but it resolved after couple of minutes, this time the vehicle had to be towed to the dealership and I lost my days work and pay. Biggest concern is how abruptly it stopped in a busy street.”

“On nov. 17 while driving app. 65 MPH on the highway the car suddenly shut itself off. All of the dashboard lights lit up & the car would not restart. After 10 min. Of trying to restart the car, the car started again, & all the lights on the car disappeared. The following day, while waiting in the turning lane at a red light, the car sputtered & turned off. All the lights on the dashboard lit up & the car wouldn't start I had the car towed on nov 18 202 to a Hyundai dealership. …”

“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.”

“I have had my car since January of 2023 and I have had no significant issues. I bought the car with roughly 30,000 miles, fast forward to February of 2026 it has about 123,000 miles and the engine is burning oil very fast. My car loses oil so fast the oil light comes on way early before my next oil change is due.”