The grim reaper has finally arrived

What Bluetooth OBD2 dongle are you using with the Dr Prius app? Have you used it previously and seen realistic data with the app, or is this the first time that you used the dongle with the app?

 

The good news is that your data indicates that you have corrosion in the voltage sensor harness and inside the ECU which is creating signal noise/chaos so the car shut it down. This is a simple clean up job and link to new higher quality voltage sensor harness is in my signature of this post below. I suspect if you get this done right away you'll still have a good chance of making it to 300K miles on your OEM pack.

 

When you see data in the Dr Prius app that is not realistic, like in your screenshot, it means that the problem is the dongle. Buy one of the dongles that is recommended on the Dr Prius website.

 

My experience is if the dongle is bad it won't connect... But if the dongle gives impossible data from the hybrid battery pack it's corrosion causing signal noise to the point that the battery data is not accurate, but it still stays connected and works fine for non-hybrid battery related features.

 

Elm 327 purple works perfectly cheap . As mentioned this is a quick cleanup job and you might make it to 400,000 MI because thedata here is fubar

 

Ask Jack what he thinks about the screenshot shown in post #1. I think that he will agree with me that the problem is the cheap bluetooth dongle that the OP is using.

 

You don't have to gut anything I only remove rt side trim in qtr. But if you're going to do the rear shocks at the same time just because then you'll have to swing in the other side panel to get it the nut that lets shock lower . You should be able to clean everything up and replace the fubar harness if that's so in bout three hours . Unless you see some very troubling things inside.

 

Those numbers are obviously not real. How could the pack possibly sustain a negative voltage of more than 1000V, roughly 4X what it is normally but in the opposite direction?

As Tom indicated, there is probably an issue with the wiring. Note that the first module has a plausible voltage and none of the subsequent ones do. That suggests a connection problem between the 1st and 2nd modules. Also possible that the dongle is screwy, but both things can be true at the same time.

Edit: Just noticed the battery temps, those are bogus too. -500F is below absolute zero, I guarantee you that not matter what is wrong with your car, or any car for that matter, no part of it will ever be colder than absolute zero.

 

There is a problem with one of the two modules that makes up block #6. That is the reason why the voltage of block #6 is lower than the others.

 

Has anyone looked under hood of ,HV battery yet?

 

Just info one edge of screws with it sitting on car lift car cover up yep it bent it. What ya see behind facing black cover over orange connections??

 

Why do you think the wiring harness and hardware needs to be replaced?

Based on the Dr Prius screenshot in post #13, you have a bad module in battery block #6 that needs to be replaced. Read post #14.

Replacing the wiring harness will not fix the problem with the bad battery module.

 

Looks like the battery's been messed with already possibly