Check engine light, red triangle with exclamation, and on the monitor a red box with a picture of a car with exclamation came on after changing the rear brakes. I checked the water flow control valve and water pump. Don't know what else to check.
I'm sure someone will correct me if I'm wrong, but changing the rear brakes on GenII Prii sets an ABS code that has to be cleared by the dealer or someone with access to diagnostics.