Red Triangle of Death with temperature warning?

i have a 2008 prius with something like 180k miles on it. the other day while driving the red triangle of death started flashing intermittently, accompanying it in the touch screen display was the word "problem" followed by what looked like a red temperature sign. it didn't impair my ability to drive at all, so i hurried home & haven't driven it since.

i was driving, so i couldn't take a picture, but i found some one else on the net who had the same issue, their display is exactly like mine.



it's probably worth mentioning that prior to these shenanigans, i had the ac amplifier replaced and also a wheel bearing. i don't know if that could be related but quite frankly, nothing surprises me anymore.

any ideas anyone?

 

based on prior suggestions, i checked the coolant levels and made sure that was fine. i cranked it once when i saw the red triangle again and had someone run a diagnostic on it - it churned out P0A7A with the message "generator inverter performance".

the battery in the trunk - the auxiliary battery i suppose? gave a low voltage reading, about 10~11v. i took it out, dragged it to autozone to be charged and brought it back. i tried again - vehicle cranked once and now it's quiet. there are no companion codes to that, i'm stumped. i feel like this car just won't quit.

please see my message above, do you think the failed inverter pump fits the bill?

 

i managed to crawl it into the garage, these are the error messages being displayed. i hope its visible.

 

the light was intermittent - it would be fine for stretches of time, then flash for a few seconds and go away. i was on a stretch of rural highway, so i just went home & parked it. i'll check my oil & coolant as suggested, thanks.