ALL the warning lights suddenly came on....

Try another location for Autozone, Oreillys, Pep Boys, or Napa.. each location may carry a different OBD2 scanner, and if you get lucky one of them might be a Toyota hybrid compatible DTC (code) scanner.

Almost sounds like the HV battery has given up the ghost, who did the refurb and what's the warranty on the recently installed item?

 

I agree, it sounds like the HV battery is faulty.

 

how many miles on her?

 

Check that the inverter pump is working. Look for turbulence in that tank with the cap off. (NOT the radiator cap!) If that pump fails the inverter may overheat and then everything lights up. If the car cools off and you reset the CEL it won't light back up again immediately. This tends to come on during freeway driving since the inverter is under more load then. You do not want to drive on the freeway for an extended period with that pump out of service since cooking the inverter and transaxle is a bad idea.

While the OEM pumps seem to just die I had a Dorman replacement pump fail intermittently. So even if you see turbulence once it isn't a 100% guarantee that the pump will work some other time. If there is no motion though, that is most likely the problem.

 

As pointed out earlier, that might very well be the problem. New to your daughter, does not actually mean new battery. A refurb battery is still but a collection of old second-hand modules. The only reliable replacement battery is a Brand new one with all brand new modules.