2014 Prius Brake Pump Failed Again?

Hi everyone,
I have a 2014 Prius. About a year ago, I replaced the Brake Master Cylinder and the Brake Booster Pump assembly using used parts from a salvage yard.
After the installation, the system worked, but the pump motor was significantly louder than before (I suspect it was installed without the rubber isolation grommets). It also cycled very frequently—running after every 1 or 2 brake applications.
A few months later, I started getting intermittent warning lights that would clear after restarting the car. Scanning showed code U0073. Recently, the lights would flash for a second and disappear without needing a restart.
Yesterday, the situation got worse. I am now getting the "dreaded" codes: C1252, C1253, and C1256.
My question is: Do I need to replace the entire system again?
The repair is so expensive that I'm considering selling the car as-is or even scrapping it.
Is there any hope that a failing 12V auxiliary battery could cause these specific codes? I’ve heard it’s a possibility, but I’m worried that the used pump I installed has simply failed.
Any professional advice would be appreciated.