Red Triangle, yellow indicator, VSC, check engine light

Good morning. I’m probably going to drop off my 2008 Prius at the dealership after work, but while I’m at work I’m hoping to get some help with what’s going on and maybe save a trip to the dealership.

My 2008 Prius has been occasionally been staying on while at complete stops. Like, the engine stays on and and sometimes it even starts to rev high. The air vent on the rear passenger side has started to blow (I’ve never consciously heard it blow before) and just this morning the ((!)) light, red triangle, check engine, and VSC lights turned on.

Oil looks good, I’m pretty sure there is turbulence in the inverter coolant reservoir (lots of movement but doesn’t look like the nice little spiral that I’ve heard to look for), and when I drove it a short distance to work it drove pretty well with normal MPG. The A/C is still blowing nice and cold too.

I had it scanned at autozone (I know, not the best idea) but it pulled some secondary codes:
C1259: (ECM Communication Malfunction (TRC Signal/Idle up Signal))
C1300: Malfunction in ECU
C1310: Malfunction in HV system

Not sure if those codes are any actual help… I know you usually need to have a special scanner.

I’m a pretty new Prius owner, I bought it used a few months ago with 168k miles on it. I’ve done some quick searches around the forum and it might sound like I kinda know what I’m talking about…. But I really don’t. So any and all help is appreciated. From what I can tell, it’s probably the fancy battery and it’s probably not covered by warranty anymore.

But please help me figure out what’s wrong! Also, should I buy one of the special scanners?