check hybrid system light came on

On my way home today, my check hybrid system light came on. I hooked my my basic cheap Bluetooth scanner.
I was wondering what codes came up as I was on the way home. I hit clear. They went away. The Car is safely parked.
Seems like the engine had a smell and was hotter than normal. 240k on it, new OEM water pump. My inverter flow was never able to see if it was running. I think maybe the pump could be bad. I want to get a more advanced code reader tool to check the car out. Any idea. Rebuilt 6 months 6-month-old. 100% don't think it's the battery, as it charges and discharges properly to me.
Any advice. And what's a basic better black friday code reader to get? Going to load test the regular battery.
I think it's an inverter or pump..just guessing..new headgasket 1 year..
I put 60k on the car in 2 years...
If the inverter is bad, is eBay bad for a used one? Thanks in advance

 

Is thier a scanner tool i could be to.narrow it down.??
Any ideas where to start. I have tools and experience. Just the hybrid is difficult for me.

 

Question on a gen 3. Invertor plastic tank. With the car running is the fluid supposed to be flowing while car is running. Mine never has. .

 

Can you recommend a black friday code reader that will give me more info or the type I need. I got the basic cheap $15 Bluetooth one.

 

I posted on here yesterday about the hybrid check engine light on. With a basic code reader, i removed it car was ok. Came on again I reset it.
I brought a rebuilt battery, it went bad in only... they game me another one.
While being stumped all night. Thinking maybe inverter or something else and ordering a better scan tool, I remembered i got the Dr. Pruis app.
I did test today to see if the battery was ok. Test is bad, 33.3% capacity left it says at the end of life, weak block 8.
Before buying a rebuilt battery, I got some used cells on eBay and installed them. Was better. But later on, I treated myself to a rebuilt battery.
My question is. I will put in pictures at the bottom.
Can I last a few weeks like this?
I can take out and battery apart. Should I just replace 2 cells in #8 block? Happy Thanksgiving, thanks for reading.
you guys think i will get stuck..i can put cells in myself sunday..advice

 

Thanks for fixing this. The senior treats people like we're stupid 200 things can be wrong. Why say such a hi number.
I worked my career customization of cars.
My buddy of 45 years is an EV tech at Cadillac. Since 1979. Yes 79. His only job. Some here rough you up. I know 1 thing for sure my car will be fixed really soon. Thanks for the help.

 

Come on 200 things. Ok . You know, i'm a forum member on an uber forum with over a million subs. I share my experience and wealth and knowledge with a lot of people.Some of you guys with the knowledge like you above seems like you don't really want to help at all.And with so much advertisement on this forum, maybe I need to move to a different one.This is the only prius forum.
There's no urgency to help nobody the one man that posts all the diagrams and online files from canada.He seems really nice.

 

You're making it sound like building a rocket. Ok, take to Toyota. Pay $300 to look at. Fix what they say is wrong. Pay for reprogramming if someone needs it done. or borrow my foreign neighbors $2500 scanner he dont know how to use and deal with his albaninan headache. poor english he has. no matter what whats wrong is not major. my car earns me $5000 a month. i just dont have any hybrid shops i ever used.