Interesting, I didn't realize that

I flushed the PS fluid, didn't help. Came back again, so I ordered a valve block.

There's a theory that the main AD hose has plastic lining that sometimes loses integrity from all the heat, which causes drop in pressure and resulting errors.

I don't have AD, so no personal experience.

Tell me about it. Not sure which line you're referring to exactly, but I had a hose burst in my system a few weeks ago. Not only did it make a massive mess under the hood, but I had the pleasure of limping the car home with no power steering, and it made the suspension feel like a 500,000 mile taxi.

I seem to have the same problems with my dynamic drive as well! Did the valve block solve the problem?

If you are referring to my post, yes, replacing the valve block solved the issue