Prius sometimes hesitates.

2010 Prius, 174k (think that's the number) level 3 trim. I've taken note that I need to clean out the EGR pipe/cooler and intake manifold and maybe something else. Can I pay someone to do this? Will toyota do it? Back onto topic. The last 2 times it's limped/hesitated is one time it was cool, cold engine, A/C low or off, 2-3 bar HV. I go to pull out onto the main road and it just doesn't want to accelerate. Later that day, leaving work, cold engine, very hot, crank ac, make it to the bank, sit at bank for a while. HV is somehow fully charged. I leave and go to accelerate and it revs up a tiny bit and you can feel it pull, then the rpms die down and it accelerates slower and pressing the gas again didn't make it go any faster. Full throttle was snail pace. Or maybe I didn't go to the bank and sit idle for a long time. I can't really remember that well as it was about 2 weeks ago and I didn't take much of a note.

Either way, the engine will give a little rev up and you can feel some acceleration, then the rpms lower and it pulls slower. Like I'm trying to floor it and it's doing 1mph acceleration every 2 seconds. Toyota has done all the service up to 120k if not more. (that website is super slow) While it usually does 2-3 every second when I'm going 10-30mph. I can hear the HV fan at times. One time I had a scan gauge and I don't think the fan went over 50%. Maybe it's time to hook the gauge up again? There are no warning lights. I've been wondering if it could be the CVT? I have no idea about changing or checking it's oil.

Is there anything else for me to look for? Is this just because of the EGR? I keep wanting to put money into some minor things like tires and alignment, and a A/C check, but I don't want to put a handful of money into something and have it die in 2k or 6 months or something.

Thanks,
Higgins909