Does P0441 clear itself?
Usually takes about a week for it to reset on it’s own, which is basically what it took for you.
What is EVAP?
Evaporative Emissions Control The Evaporative Emission Control System (EVAP) is used to prevent gasoline vapors from escaping into the atmosphere from the fuel tank and fuel system at all times. The EVAP system is designed to stop fuel system fumes from leaking directly into the atmosphere.
Do OBD codes clear themselves?
If the condition that caused it to come on is a minor fault, and stops occurring, then yes, it will clear itself. If the condition indicates a larger problem, then it will stay on until cleared manually. A good example of a condition that will clear itself, is low brake fluid.