Maintenance done recent HV battery replace triangle back

As long as the car is drivable it should not be a problem. (You might need to disconnect the 12 V again before you're done.) You need to get an OBDII reader that is capable of reading all of the Prius ECUs, not just a basic one that reads the engine, ABS, and (sometimes) SRS ECUs.

Use the code reading service at the auto parts store if they have one and if they can read all the codes like the HV ECU and battery ECU then get one like that.

Another option would be a BlueTooth dongle and a phone app like Torque Pro or Dr. Prius. Check with those app's website for a recommended dongle that works well with them.

Once you have the codes, share them here for more direction.

 

what is the process of applying for green bean warranty?

is the burden on you to prove it is bad, or do they come out and check it?

 

SanGregprius think about getting a Mini VCI off Amazon with TechStream. It's awesome, it allows you to talk will every sensor in your prius for a pretty cheap price. Just bought this one and successfully fixed my car with code and help from SFO on this forum.

This is the one I bought. You need a portable laptop with windows 7, 8.1, or 10 I believe.. 64 or 32 bit. It's pretty easy if you know how to update drivers. A lot of people that have zero computer knowledge say it doesn't work but it does. The seller will even do it for you if you feel comfortable enough to let them connect to your computer. I just followed the directions it came with and was up and running in 5 min. Good luck.

 

So, are there still Error lights on the dash? If there are lights there should be codes, if there are no lights there will not be any current codes.

The blue driver should be able to read All Prius codes. You may need to check that the correct model Toyota is selected. I'm not familiar with that app, so I can't give you specifics.

Some models of Autel are Prius capable, have you tried yours? This is presuming you have the one that can load multiple make/models and is not just a basic reader.

 

If I'm remembering right, there are existing threads about the battery fan failing due to corrosion at a fan connector, leading to codes about the battery fan. I'm even thinking the connector photos in some of those earlier threads looked kinda like that one.