Had this problem a few years back and took it to a dealer because it was still under warranty. First they said it was related to the gas pedal/throttle and replaced parts. Picked it up, took it out on the highway, floored it and issue came right back. Turned the car off and back on and it went away. Each time this happened to me the check engine light would come on, I'd turn the car off/on it would go away. Took the car back to the dealership and they ended up putting a new ECM/ECU in the car. Since then I have had the issue happen one other time. Turned the car off/on and it went away. Floored it many times since with no issue. Not sure what to think.