Code po325 keeps popping up

Given the mileage, a good suspect is a stretched timing chain. That will cause low power, and if it is slapping against the housing, the knock sensor will pick that up as spark knock. You can see this on a scanner as the engine computer keeps retarding spark timing, or the timing is bouncing around.

Thanks for the helpful information. i will check the timing components.

Keep me informed of your progress. I will get another expert involved if that becomes necessary.

could you tell me the location of the knock sensor?

Hope you can read this. It gets too blurry if I try to expand it too much.