My 2017 Energi did something unexpected on my drive home today. I fully charged the car today at work, drove about 1 mile on a slow road, mostly flat with some down hill. I was in EV now mode and the car was driving fine on the HVB. I then got on a 1/4 mile down hill stretch of road and I put the car in low and was regen'ing the battery. About half way down the hill, the engine turned on very roughly and it kicked me out of EV now mode. The orange pop up that says the engine is on came up on the left display. I could not shut the engine off and had to drive about 1/2 a mile before it would come out of Auto mode with engine running and go back into EV mode. Seems weird that I couldn't use the battery for a while, but maybe I hit max charge on the down hill and the computer was protecting the battery from over charging by the regen. Maybe I hit max battery temp and it wouldn't allow me to draw current until it cooled back down some???
Anyone have this happen to them???