so it's been happening lately that in econ mode my engine starts, which didn't happen before. this bothers me because I have a very short commute so even if the engine shuts off after 5 minutes, that's like half my morning commute. it's happening when the battery is fully charged. first times it happened I figured out that it was likely because I was setting cruise control on while on the street, before reaching the highway, with the battery fully charged. I figured that when the car needs to slow down in cruise control mode it needs the regen so if the battery is full it won't be able to slow down so it start the engine. so I stopped using cruise control until I get tot he highway, and by that time I've used enough of the battery to re-enable regeneration braking, and the engine stopped turning on for a while (a week or two). however, yesterday it did it again. once again I was fully charged and this time I didn't use cruise control, however I was going somewhere else so I entered the highway right away with a full battery and accelerated in econ mode to highway speeds (normal acceleration, I didn't activate kickdown switch), and then I noticed the engine was on. while looking at the fuel consumption gauge, it was sitting pretty much at zero the whole time but the engine was running. so I guess it was just running idle. I specifically use econ mode because it doesn't turn on the engine, but normally before I enter the highway I've traveled a few kilometers so the battery is not at 100%. is there a reason the engine would turn on at highway speeds with a battery very close to 100%? I may have pressed the brake when entering the highway to merge with traffic, but that was with the brake pedal not cruise control. could this trigger the engine? I want to figure out how to avoid turning on the engine since as I said, I usually have very short drives and my battery is always sufficiently charged, I don't want to burn gas for no reason.