Red Triangle keeps coming on intermittently

Hello, this is my first time posting here so please go easy on me.
I own a 2008 Gen2 Prius with 300,000 miles on it, it's been throwing a red triangle intermittently for over 2 years. I have a Torque Pro app and an OBD2 meter, which I found one code, a MAF Sensor error. The hose clamp underneath was loose, so I tightened that, and I replaced the MAF Sensor around March, which got rid of the Check Engine light and the code. Using the OBD2 meter now, even when there's a red triangle, there are no codes.

The red triangle did not stop though, which kept coming and going, I tried replacing the wire under the fuse box that I read fixed it for someone else on here, but I may of done a bad job of it. There is no reliable way to get the triangle to trigger, it's entirely random. The car does burn through oil pretty quick, roughly 1 quart in between oil changes, but I check and top it up regularly, the oil can't be the issue.

I attached pictures of the torque apps readings, from what I can tell the battery blocks are all in good health, they are running hot maybe? The temperature I got off of the torque app was reading in the 90s, and during a drive, I had someone else watch the readings as I drove, the temperature went above 100 degrees. I'm not sure what a normal battery temp is.

The engine overspeeds when the battery is entirely full, fairly often going down shorter downhills, when years ago, it would only overspeed on long hills like a mountain.
Yes I've taken it to a dealer, no it hasn't acted up when I could get it there, not until today, but he only used an engine OBD meter, not hybrid battery compatible, it didn't catch any codes either.

I don't know what else to do at this point, I've tried so many things, looked up so many suggestions and guides on how to fix this and nothing has worked.


I will provide more info if need be, thank you. ​

 

The 12V battery was changed two years ago, and doing the voltage self check, the first reading was 11.9v, the second with lights on was 11.6v, and the third with the car all the way on was 14.1v.