Check the flux capacitor.
This site needs a sarcasm emoji.
The problem turned out to be that the key wasn't communicating properly or well with the Immobilizer System. Using the second key, which had rarely been used since the car was purchased, has solved the problem. The battery and fuses were fine. Thanks to all who tried to help.
I think I can count the # of experts in one hand, and I am not one of them. The rest of them are "experts" at best.Look here https://priuschat.com/forum/ Lots of experts.
I've been a member of the forum for a few years. There was no help there for this problem.Look here https://priuschat.com/forum/ Lots of experts.
This is the same for BITOG.I think I can count the # of experts in one hand, and I am not one of them. The rest of them are "experts" at best.
The MFDs on the second generation Prius are prone to fail - and they are the “master” mode for some of the car’s body networks(Toyota calls it AVC-LAN, Honda calls their implementation GA-NET, both are based on NEC/Renesas IEBus - CAN and another Toyota-specific bus called BEAN also goes through the MFD), lose the MFD, a Prius can be “brain dead”.I'm puzzled that this was caused by a dead keyfob. That doesn't explain the engine stalling...and doesn't the Prius have a "key not detected" alert if you try to start it without the fob on you?
They last reasonably long if not abused. The $65 generic U1 AGM in my Prius is over 6½ years old and still doing its job, with none of the symptoms you listed. I've heard of them going over 10 years in other Prii.... Batteries don't last long in the Prius, ask me how I know, and you'll typically see other issues as they start to get weak. ... My gen 4 is on its third 12v battery in 5 years. ...
Sounds like you've got a gen 2 or 3 with the 12v battery in the rear. Batteries don't last long in the Prius, ask me how I know, and you'll typically see other issues as they start to get weak.