P1121 Changed Valve Again

In 2023, I was getting P1121 & P1123 on my 2005 Prius. In August 2023, I bought a genuine Toyota
16670-21010. Today I changed out the valve AGAIN with a genuine Toyota part. So much for buying a OEM part!
For about a year, I have been getting a CEL and after awhile, it would reset itself. Sometimes I reset the code with my tool. Usually checking to see that something else was not happening.
In the last month, the CEL was staying on. I would reset the codes and they would set the CEL on the next startup. P1123 would be the lead code.
After I changed the valve and bled most of the air out of the system, I did a test drive and noticed the CEL was off. Hope this lasts longer.