Can’t speak for all models, but on my car there are cables (maybe what you’re calling harness, sort of like bike brake cables) that run from the actuator to each brake assembly. One of mine broke which caused the fault.

Wow I've never seen those break but no those steel cables are intact, my error is present ss soon as the key is near the car before i would even use the parking brake so that would lead me to assume its electronical/programing

It could be a module; I don't know which one but I'd guess the FRM which has its issues. Maybe the JBE module? Then there's the EMF module itself. You've replaced the actuator, I gather, but not the EMF module? Then I'm thinking of all the interconnecting wiring. I get the frustration. I troubleshot a PDC error that ultimately turned out to be chafed wiring. That took some time to find.

Put the car in workshop mode and it went away hoping it stays lol. Clearing it would cause it to return immediately

Ugh its back :(

That’s not how it works. Did you code the new module to your car? How do you know you don’t ha e a broken cable?

I know due to not having broken bowden cables before and after i switched the parking brake module plus new cables, as for the programing i did it through nscs but i will be running an series of electrical tests between the parking brake switch and module harness