2008 throwing ton of codes, mechanic stumped

First thing to check is your 12 volt battery Make sure it has amps behind the voltage it's showing Short the battery for a second does it recover If not time to deal with that looks like you had some communication problems You're solenoid offset valve needs recalibrating and so on did somebody just recently put on a break actuator that's the expensive part of the brakes? But it seems like you've lost a lot of communication or things aren't speaking to each other usually that involves something to do with 12 volts for the computer systems.

 

You as a Prius owner really should get yourself a capable scan tool The kind that plugs into the plug under your above your knee there and it can Bluetooth to your phone this thing called an AP200 will save you a lot of time and headache You should look into it It's the best $63 you might spend It will save you more money probably then pretty much anything else has so far The codes is your reading them now is not the way to be doing it but if you need to you need to your scanner will help you a lot more or it seems to help me a lot more so.

 

What device were the error codes read with?
Do you have a printed sheet with system diagnostics?
How does the car behave visually? Are there photos or videos of malfunctions?