2000 TOYOTA COROLLA CODES P0440, P0441, & P0446: Most likely cause(s) with all 3 codes present?

Question

I erased the Codes P0440, P0441, & P0446 but anticipate they will return with illumination of the Check Engine light. Is it likely that replacing the fuel filler cap (with Toyota part) will fix this?

Answer 1

P0441 Evaporative emission control system incorrect purge

P0440 Evaporative emission control system malfunction

P0446 Evaporative emission control system vent control malfunction

The most likely cause will be at the purge system, without the purge the vent will set a code. Check the purge hose which is connected to the MAF air duct , or air cleaner to throttle body air duct for disconnection to even a broken air duct.