I was driving down the highway and the car lost power. It wouldn't drive more than 35 mph. I kept trying to hit the gas pedal but nothingI I pulled off to the shoulder for a minute. When I continued it accelerated normally for a couple seconds then back to 35. I got home, parked it and my husband drove it the next day and it did the same thing. He parked it and I took it to the dealership on Monday and it wasn't showing any codes so they said I needed to bring it in while it was doing it. It's done it again and almost caused an accident but it was after hours (of course) and wasn't doing it the next day. Don't know what to do. On the Hyundai website I contacted them and never heard anything back from them.