How come my vehicle says not ready even after driving it 200+ miles

Hello, I would encourage you to seek diagnosis for the systems that are not ready. When the engine control module runs through self testing for the readiness monitors, it has the ability to restart the test. Think of it as multiple chances to pass. If the computer is not allowing the self test to complete, it may be because there is an issue with one of the components with that system, or the values they are reporting (if accurate) show a functional problem with another system.