Error codes, HV battery

As the old saying goes, if it looks like a duck and quacks like a duck, it's probably a duck.

You've got all the symptoms of hybrid battery failure, from poor fuel economy to bouncing battery levels to fan always on to the actual error codes. Sorry to say, it's time to either replace the hybrid battery or get a different car.

 

welcome and well done, all the best!

 

be careful taking it apart, there is a method so as not to die from electrocution. and high voltage gloves are recommended by some.

 

I'm experienced with electricity and have the proper PPE, so what scared me most about changing my battery was lifting it, bent over in the back of the car. An extra back would make that part safer. It's light enough you don't really need the help, but it's a bad position.

 

Additionally, when putting it back together be sure to properly torque all the electrical connections to Toyota specs.
Seen some bad stuff happen from too much torque (sheared bolts) or too little torque (arcing/fire)

 

Here's what I did:

My P0A080 fault code and battery rebuild | PriusChat

Good luck!

 

Well you don't have to rebuild the cells, you can just pop in individual replacement cells.

Swapping out your used HV battery pack for other used HV pack is about like have 1 lightbulb go bad in your house and ordering 28 used replacements.

You should also get a mini vci (for laptop), or bluetooth obd (for android) if you don't already have one.

 

For the record and newbies, it's "modules" not "cells" that are replaced. There are six cells in each module which isn't serviceable (openable) under normal circumstances so one can't replace an individual bad cell.

hope this helps

 

This is rather simplistic advice. Also the analogy is bad, because swapping a light bulb is not like swapping a battery module.

While I agree with what I believe to be the gist of what the poster is saying, this thread puts what is involved nice and succinctly:

Can I save my 07 Prius? | Post # 30 | PriusChat

If you read from this post on, I think you get a good idea. You can go back and read from the beginning to get context, but Brad pretty much knows what he's talking about.

hope this helps.

 

I don't agree with the light bulb analogy.

In tear I use a really rusted chain as the analogy.

If one link in the rusted chain is broken, replacing the one link is not going to fix the rest of the rusted chain. It will only be a matter of time before another link in the chain breaks.

Better to replace the entire rusted chain at once with a known good one.

 

I also do not agree with the light bulb analogy. Think of it as a loaf of bread with mold gathering, taking out a slice and putting a new slice is not going to stop the mold from spreading throughout the entire loaf. Once a module fails, you are on borrowed time until the next one goes...much better to get a fully revitalized battery replacement with a warranty.