How do I fix the following errors? (P0441) (P2420)

Both are emissions codes did you possibly not tighten your gas cap or leave it off? And put gas in your car while it was running? These could possibly cause the codes but the p2420 this can be caused by a bad switch. I would take it to a repair shop and have it diagnosed it shouldn't cost that much. Please have it checked by a professional and don't try throwing parts at because you tried diagnosing it on Google. Just because the code says something doesn't mean that is what's wrong with it. We do know it in the emissions system but you need someone with experience and the correct equipment to diagnose it.

@sinan1 by know you probably already know that P0441 is indicative of the Evaporative control system purge flow being incorrect. Yes, can be something as simple as a bad Fuel Cap. P2420 is a code for Evaporative Emission System Switching Valve Control Circuit High which is commonly caused by a stuck or failed vent valve, which would also could cause both codes to show up together. For the location of the valve check sites like this. For a proper diagnosis you will need at least a vacuum pump and a multi meter and use the Emission control part Yaris Emission Control from the service manual as your guide.