I would verify the can lines from the display to the traction motor. With the key off, testing can hi to can low should be 60ohms. Testing can hi to can hi should be 120ohms. If you are not seeing that resistance, than one of the can resisters is bad and needs to be replaced. 99% of the time replacing the module is the only way to fix that issue. The can system is very sensitive and should never see high voltages.

With battery voltage going through the can lines, there is a high chance one of the modules is now bad, but you will need to test the can circuit to verify.