When traveling at 70-75 mph on highway, my engine light came on. The car suddenly started to decelerate until I could only go 25-30 mph (no matter how much I pressed the gas pedal). I had to drive about 5 mins. Like this (with my 4-way flashers on), as cars passed around me at high speed, until I could find a suitable place to pull over on the shoulder. Once safely on the shoulder and stopped, I shut off the car, waited about 2 minutes, then restarted the car - then everything seemed to be fine. I drove home without incident. The next day I took it to the Acura dealer and they acted like it might have been the lane assist tech getting confused by the lines on the highway, or by water puddles. They said that because I shut the car off and restarted it, that any "codes" that might help them figure things out were lost. They said next time, do not restart the car but have it towed right to the dealer. I pointed out how inconvenient and unsafe that might be to do! they also said they had heard of no other 2020 Acura Rdx with this problem. I pointed out that I found a bunch of owners online who has reported this with 2019 Rdxs. They conceded that they just didn't know what was going on. Finally, I want to note that this car is only 2 weeks old!! I just bought it and this happened :(

- Coplay, PA, USA