When the battery becomes discharged to a certain point, the car is programmed to fire up the gasoline engine, which normally would recharge the battery as it propels the car. … If that 12-volt battery is dead, the Prius won’t start, even if the main battery is fully charged.
Can Honda hybrid car run without battery?
No, your car will not run without the IMA battery. Reason being is that there is no traditional alternator to charge the normal car battery. So you can drive it as long as that battery will hold up with no charge, which I would imagine is not that far.