Hybrid System Malfunction

My first and only question is .....are you certain your code reader properly reads hybrid codes?

 

I can't offer any expert opinion on mechanical problems, but from your description of the car:

Isn't the car still under warranty? Or having it salvaged void warranty?

 

I doubt it: P0658 is a generic SAE diagnostic trouble code (DTC), for which the corresponding Toyota DTC on a fourth-generation Prius would be P065714. The same is true for U0284 (Toyota U028487). It’s also unusual to have a “Check Hybrid System” message without any hybrid system DTCs.

To diagnose this, you need to use a Toyota Techstream diagnostic system, or a third-party equivalent, that can communicate with the Hybrid Vehicle Control ECU and the other computers on the car, which probably have more DTCs stored. Most generic OBD-II scan tools sold for engine and emissions diagnosis can’t do this.

Once you’ve found all of the DTCs reported by the car’s computers, use the diagnostic procedure for each DTC in the Repair Manual, available by subscription to techinfo.toyota.com. The text and illustrations are also in the Chilton Library service, to which your local public library might offer access at no cost.

For example, for the two electrical problems you mentioned, the causes might not be apparent just from looking at the wire harnesses. The Repair Manual says which wires and connectors to check using a multimeter.

In practical terms, yes. The Warranty and Maintenance Guide (PDF) says the New Vehicle Limited Warranty doesn’t cover “salvage” or “total loss” vehicles at all, but the emissions warranties do. None of the warranties covers damage or failures due to accidents, however.

 

You’re welcome.

That’s one alternative, of course, and if you aren’t in a position to do your own electrical troubleshooting and repairs, it may be the best one. If there’s not likely to be Toyota warranty coverage, an independent shop that’s familiar with hybrid vehicles might be able to do the work for less.

Compared to the cost of towing and diagnostic fees, though, it’s not that expensive to get access to Toyota Techstream. I can’t endorse any of the counterfeit options; a legitimate one would be a Tactrix Openport 2.0 vehicle interface module ($169) (reviewed in this thread by @ChapmanF) and a Professional Diagnostic subscription to techinfo.toyota.com ($65 for two days).

 

The car says this for almost everything. You didn't expect it to say "minor problem, you fix it yourself" did you?

What quarter is damaged? A ding in back can screw up the fuel tank. Also, check to make sure inverter coolant is flowing.

 

Remarkable

 

Great outcome.

 

Hello
I have the same exact issue with my 2016 Prius, which was rear ended. The damage only reached the rear body panel and no airbags were deployed. Can you please provide pictures of the worn wire you had to fix