[lansman]

I have a 2010 Prius III which has served me very well for the first 93,000 miles but it may never get to 94,000. Several weeks ago I entered the car and went about using my regular push button start when suddenly, the whole car went dead! No green light on the ignition, no pressure on the brake, not even working headlights. I tried several times more and each time it seemed like the car was building up its power until finally, things were back to normal.

And then on a weekly basis this began to happen, even after replacing the battery on one fob and switching to the second fob. The dealership does not have a clue whats wrong and were not able to replicate it in 9 days. Finally I took it home 3 days ago and it has gone dead twice since and eventually recovered within 2 minutes twice!

I filmed both of the recent incidents and posted on Youtube.

https://www.youtube.com/watch?v=480YvrcVzMw
https://www.youtube.com/watch?v=wPNP8TEdFBc

Anyone else have this?

 

[Easy Rider]

This sounds to me like a case of you and the dealer both overlooking the obvious:
A 12 V battery going bad.......or a loose or corroded main 12 V connection at or near the battery.

The 12 V system runs ALL of the computer controls and the symptoms sound very much like yours is not holding a charge very long once the car is shut off.