Red Triangle VSC, ETC Engine Codes: P0010 - Powertrain, P1121 - Powertrain, P0A80 - Powertrain

The P0A80 trouble code is telling you that there are weak modules in the Hybrid Vehicle (HV) battery. To diagnose it further, I recommend that you use the Dr.Prius app to monitor the voltages in the 14 battery blocks.

You have three options to fix the problem:
1. Replace the HV battery with a new OEM battery or aftermarket lithium battery.
2. Replace the HV battery with a refurbished battery.
3. Replace the weak (bad) modules in the HV battery.

There are many threads in this forum discussing these topics. Do a search and learn as much as you can to make an informed decision.

Posted via the PriusChat mobile app.

 

You can drive it until you're running on ice engine almost full-time getting about 36 to 39 mi to the gallon if that's your aim. It's time for a new hybrid battery whether you recondition play whack-a-mole buy a new one by a refurbed one all kinds of options I've done all of the above I have not played the whack-a-mole game yet I usually let the rebuilders do that then I just pay there $700 $750 price tag and let it rip until it doesn't.

 

I replaced a single bad module in my 2008 and fixed the codes. It's worth a shot. Cost $30

 

I'll admit I wasn't sure I wanted to try and tackle it at first, but after taking the battery out twice and putting it back. It's pretty straightforward and safe, I did most of it without gloves.

I used an OBD 2 bluetooth and Dr. Prius to figure out the bad Block. I used Car Scanner to get accurate engine and battery codes.

My code was P3013 which was block 3.

I followed this video to take the battery out:

After the battery case was off and the bussbars, I used a multimeter to mark down all the voltages.

Module 5 in Block 3 was considerably lower than the rest (About 7.2 Volts and the rest were 7.8) and it also discharged faster.

I swapped that Module out with a refurbished one and that was basically all it took.

You can read some more that I did on my thread here:
https://priuschat.com/threads/finally-need-help-red-triangle-slow-acceleration-high-rev-c1310-c1241-other-u-and-c-codes.243989

I disconnect the 12v battery, then the orange service plug. That cuts the voltage down considerably. The Modules are basically large batteries like a rechargeable AA with a positive and negative only higher voltage.

You can replace all 28 modules if you want to be good for a couple years at least, but chances are most of your modules are fine and only one or a few need replaced.

 

It all depends on how weak the modules are in the HV battery. You can drive until it quits on you, and then you will need to have it towed somewhere to get fixed.

Do you plan to fix it yourself, or will you take it to a shop/mechanic to get it fixed?

Do you know if the HV battery is original or if it worked on previously?

How long have you owned this car?

Posted via the PriusChat mobile app.

 

To fix it yourself, start by using the Dr.Prius app to determine if any of the 14 blocks in the HV battery are lower voltage than the others.

Posted via the PriusChat mobile app.

 

We drove our generation too with a bad battery for about I don't know man 5 months and the ice engine just kept coming on longer and longer as the battery SOC went down and down by the time I bit the bullet in ordered the battery and we drove to Apex from Orange county North Carolina we were riding on the gas engine and the battery was just connected to complete the circuit and allow the car to drive I guess It wasn't doing anything and when we pulled it out all the nuts and bus bars were frosted messed up it was horrible It looked bad like real bad and that was that put the new battery in right back to 45 miles of the gallon.

 

If being gentle (no rabbit starts/stops), sure just drive it. There are numerous pictures of HV batteies exploding rather quickly, so be careful.

 

He has the P0A80 code which means that there is more than one weak module the battery pack.

 

https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Repair%20Manual/04pruisr/05/20zmw/cip0a80.pdf

From the above workup, "Voltage difference between battery blocks is higher than standard (2 trip detection logic)".

The current DTC points to a HV battery, ECU, or voltage sense harness issue. The OP hasn't posted any P-codes related to failing modules.

 

If it's like original battery action well soon as he lifts the silver cover off you'll see exactly the problem when he move some of those black covers up and down I'm pretty sure.

 

The owner apparently used a generic scanner which cannot communicate with the hybrid battery computer but it did communicate with the hybrid system computer so he could only see the code P0A80, but not the specific battery computer codes. The word powertrain after the code P0A80 in the topic heading confirms this i guess.

I like this part in the pdf file...
TYPICAL ENABLING CONDITIONS - TOYOTA’s intellectual property ...which means do what the code P0A80 told you to do, pull some money out of your pocket and visit Toyota dealer... don't even try to fix it.

 

If you want real help get techstream to read all the codes and subcodes. That's a first, and cheap, step. But obviously you've done pretty well without it so far ;-) congratulations

 

Yep you need a rack set of modules that will play nice with each other how you make that happen is up to you.