2017 Kia Optima fuel system problems

On [xxx], around 11:30 a.m., I was driving [xxx] on [xxx], going about 78 MPH, just passed [xxx], when the lights on the dash lit up, smoke started coming from the back of the car, then there was smoke coming from under the hood then smoke started coming from the A/C vents. There was a full fledge fire under my hood. The guy driving next to me, kinda gestured for me to pull over, although I was already thinking I needed to pull over, the shock of what was happening, I lost my train of thought.

The contact owns a 2017 Kia Optima. The contact stated while stationary at a traffic light, while depressing the accelerator pedal, the vehicle hesitated. The check engine warning light was illuminated. The contact was able to continue driving to her residence. The contact took the vehicle to an independent mechanic and was informed that the engine knock sensor needed to be replaced. The contact called the local dealer and made them aware of the failure. The vehicle was not repaired.