Codes P043E, P043F, P2401, P2402 and P2419

Hello, what size engine does your vehicle have? 2.4 Liter, 3.5 Liter. And is it 2 wheel drive or 4 wheel drive? And were there any other codes stored?
It looks like the Evap Canister Assembly has failed. The assembly has a leak detection pump, pressure sensor, and vent valve all contained in one module, but with those particular codes stored together under the testing conditions, it looks like the Evap module itself has failed. The vehicle runs self pressure tests when the engine is off. The leak detection pump will pull the system into a vacuum, and the engine computer(ecm) will monitor the pressure sensor for any pressure changes. In this case it has failed multiple tests in a row.
Toyota has their own factory scantool (Techstream) that they use for running specific bi-directional tests. Unfortunately many manufacturers have OEM factory scantools they use that are not available to aftermarket shops.
But the information below is from Toyota.
This is for the 2.4Liter engine, but it appears the 3.5liter has the same system.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

This still looks like a failure of the Evap System canister pump assembly, a problem with the wiring harness running to the canister assembly, or an ECM failure (engine computer). But if it was an ECM failure you would probably have other codes set as well. According to Toyota's information with these codes set together it's a failed evap canister assembly.

Okay, you want to try to fix this yourself then and you're saying that your vehicle is using much more gas than it usually does? And another very important question, when you fill your gas tank do you stop filling it when the handle at the gas station clicks off, or do you pull the handle out a little bit and try to fill it to the very top? Some people do this to get as much gas as possible in the tank and it can cause the charcoal canister to become flooded with gasoline. So, if you do try to fill it that way, it would explain the failure and make the diagnosis much easier.
That would explain also why you are going through so much gas, because liquid fuel is being drawn into the Evap system, instead of just gas vapor. Which is all the Evap system is supposed to do, Its only for drawing gas fumes out of the tank and using them in the engine. If the gas tank is over filled, the Evap system can get flooded with gasoline and will draw that gas through the vapor lines into the engine.
I think you're going to find that the Evap canister is going to be full of gasoline. If it's not, there may be another problem.
Also, so you know, since we can't test this system correctly, we can only go by what you find when you take the old canister down. You will need to check the wiring harness going to the canister assembly for any corroded connectors or broken wires.
Under normal testing, the whole system would be filled with smoke using a smoke machine and checked for leaks that way. By just replacing the assembly, there's a chance of misdiagnosing the problem. But looking through the information on our databases, the fix for this is replacing the whole assembly.

I would recommend replacing the gas cap first and clearing the codes and see if all those codes come back.
Don't fill the gas tank though, only put half a tank of gas in it, that way the system will run its tests overnight. It needs 5 hours after the vehicle is turned off in the evening for the system to cool down. If all the codes come back, then we will go through and replace the Evap assembly. It might take 2 drive cycles to set the codes again, so it might take 2 days before they set again.
Below are 2 examples of real fixes, so the gas cap being the cheaper one, I think you should do that first.

Okay, good. Is your gas gauge reading 0 after putting in the 20 liters? Or is that the old picture. And what is its running condition, do you notice any lack in performance, and have any other codes set yet? You will need to drive it some. We need the Evap system to run its self-tests again. You do need to run it two drive cycles, and after each drive cycle it will need to sit for 5 hours, so let it sit overnight. Also do you have your own scan tool, and if so will it show any live data? Or what scan tool is it and I will look it up myself to see it capabilities.
And I see your average miles per gallon is around 14.5, it should be up near 23mpg. This is why I wondered what your scan tool can do, I'd like to see if there is any Fuel Trim Data.

Yes, that sounds good. 6pm to 9am is plenty of time. The system runs a couple different self-tests depending on the results of the previous test. So, if it's more than the gas cap leaking it will set those codes again soon.
And you have your own scan tool?

Yes, that is an ELM327. What phone app are you using with it?