Triangle of death on still even after replacing hybrid with refurbished and new 12V battery

Get the error codes and clear them... Or just clear them by disconnecting 12v battery for a few minutes.

 

Get Techstream to read the codes and sub codes. Without these it's guesswork.

 

Instead you could buy a Bluetooth OBD2 code reader for less than $20 and that will allow you to use your phone to run apps like Dr. Prius, Car Scanner, Hybrid Assisstant, etc.

Veepeak makes a good OBD2 reader...

 

You can buy cheap refurbished laptops with Windows 10 on eBay and Amazon. And use one as your Techstream platform. Techstream has a lot more capability than any apps. These cars are quite complex and knowing the exact fault codes and subcodes can narrow down the issues and get you the best advice. This may not be quick and easy but repairs to these cars are rarely quick and easy. Good luck.

 

You have codes somewhere. You need a more capable scantool to read those codes and data. Here's a thread that reviews several scantool apps and devices. Some are capable of scanning all systems on a Gen2 Prius.

Another option is Techstream. There's the "legit" version that's a X dollars for Y days of use, plus you need a Vehicle Communication Interface cable. There's many hacked versions on the web (that have cheap VCIs). Or you can search this forum (I think around mid 2022) for a thread about Techstream Virtual Machine (VM) downloads (you'd still need a VCI).

https://priuschat.com/index.php?posts/3290690
Posted via the PriusChat mobile app.

 

Well since you want to do a lot of looking and playing around depending upon the year look at your orange plug that goes to your HV battery computer You see the brown corrosion and nonsense? If so pull the 10 or 8 mm screws I think there's three unplug the plugs withdraw the computer take the cover off the top of it spray it with electrical contact cleaner You can look at the board with a lupe or magnifying glass and see if you see any fubar areas on the board after you clean the plug and it's bars that run to the board on the back of the plug look at the buildup some small brushes will clean that up One of my battery guys claims that wants to start to these computers they'll be throwing codes randomly forever Not sure if I really believe this type of thing because the few that I've cleaned have never thrown a code again waiting for their respective batteries to die or whatever.

 

I heard the wiring harness is sometimes gone.
I found this video helpful. It explains how corrosion can wick from the module terminals through the wiring, and even to the battery computer connector.