Suggestions for P0A80 error - Replace/Repair

It seems like it's about that time. 2012 with 198K miles.

About a month ago, I got the error code P0A80 for the first time when my car failed to stay in EV and unexpectedly kicked on the ICE and displayed "Check Hybrid System". Since then, I've had it three other times, all when going in and out of the EV range (think accelerating in stop-and-go traffic or up a hill from under 35 mpg) - the ICE kicked on and threw the error.

I ran Dr. Prius and got these reports:


The app recommends I replace the battery based on the health of one of the blocks and the remaining capacity.

1. Based on the mileage, the error that keeps getting thrown, and the report from Dr. Prius, I assume it's time to bite the bullet and replace the hybrid/traction battery, correct?
2. Should I go OEM or aftermarket?
3. If aftermarket, which battery would you recommend? I've seen the brands/products from newpriusbatteries.com and projectlithium.com mentioned a few times in different threads.
4. Are there any other parts that may cause this failure? How can I rule out the inverter?
5. I believe I saw a few people mention replacing the inverter as part of a service bulletin or recall may help with hybrid/traction battery issues. Does that seem to apply here? Where can I find out if my car qualifies for this, just call a dealer, or am I barking up the wrong tree?

Thanks in advance for everyone's time!

 

If anyone has insight into my issue, I'd love your input.

 

Is the 15 year traction battery warranty available regardless of what state you live in? For example, I live in Utah.

If for some reason it doesn't, would you suggest an aftermarket battery like newpriusbatteries or projectlithium?

 

Thank you for your help. It seems in this case a warranty doesn't apply.

Do you have any experience with newpriusbatteries or projectlithium or do you suggest going OEM?