Gas Acceleration

welcome!

sounds like your hybrid battery is getting weak, but it might be worth checking the 12 volt health, and hybrid battery intake grille, vent an fan for obstructions and cleanliness.

 

Well you don't really understand the operation correctly, as you would have to accelerate at about a walking pace (very slowly) to prevent the ICE from coming on most of the time.

But it does sound like something isn't right.
Without any other indications, you need a qualified shop to look for codes and check things like the HV battery cooling vent and the 12 V battery's health.
This could be a sign of the HV battery going bad but that usually lights a warning light.

 

Well that is a general question. What your question implies, is that your internal combustion engine is running constantly without charging the battery and without moving the vehicle. Something that actually is impossible. If your internal combustion is running, then it is either applying force to turn the wheels, or forcing motors (the electric motors) that charge the batteries to generate electricity, I know that when ever I depress the accelerator more than 30% my ICE (internal combustion engine) will start. I also know that when I have less than a 50% battery charge it is more than likely that the ICE will be on unless I am traveling less than 7mph. Most fundamentally, I know that my gas mileage will always be better than 42 miles per gallon and that is with the auto AC set to 70 even in Fresno's 100° summers. I also know that when I park my Prius leaving my dog Friday on guard while parked, the engine will come on and charge the battery as needed to keep the air conditioning comfortable for him, and it will still get 42 miles per gallon. If you read the fine print in your manual it will explain why.
So that brings me to my question; how has this condition that you have mentioned affected the way the your miles per gallon?
Then try this, Park the car, set the parking break, turn your light and auto a/c off. Set a timer and see how long the ICE runs until it stops. Note the number of bars on the battery. Wait measure how long it takes before that I CE starts again, note that the number of bars on the battery will be less than two.


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