VSC light, (!) light and Red Triangle of Death; P3000 code

I have a problem with my 2007 T4 prius. I have already changed the Hybrid Battery ECU and I have tested all the battery cells' voltage, which are all the same or very close. The oil on the car is at good level, I have changed it and the filter + Transmission fluid, the coolant is at ok level aswell. When I turn on the car at morning, the lights on the dashboard are off, but when I have driven the car for about 30 minutes, meaning it is warm, the lights on the dash turn on, this happens everytime, after 5 hours of driving, when I floor the car, it has a later response to acceleration, which wasn't like before when you would accelerate the car. I have cleaned the connectors on the battery, I think that the problem is not the battery. Can someone recommend something to do to solve the problem?
I have attached a image to show the dashboard on my prius.
My Prius is at about 200k miles and is still running but there are these problems and I wish to fix them

 

Thanks, I'll check and then give you an update

 

Coolant is moving rapidly when the car is ready and the code I have is the p3000