I have a 2nd gen Prius. You can generally use the EV button to prevent the motor from turning on. Perhaps unrelated, but when turning on the engine for the fir

I have a 2nd gen Prius. You can generally use the EV button to prevent the motor from turning on. Perhaps unrelated, but when turning on the engine for the first time in a while the Prius will burn gas to heat up the engine. You can prevent that too by pressing the EV button right after pressing the power button. (Or maybe you can hold it down while pressing the power button?) Not sure if it works all the time.