Yes, 4-5-6 are history codes, 1-2-3 are current, all EVAP related
The EVAP system does one thing and because it is Emissions related it will turn on CEL when a problem is detected.
The EVAP system prevents gas fumes from exiting the fuel tank........that's it, that's all it does.
When you turn on the key the Vent Valve will get 12volts and Close, this allows the EVAP system to maintain pressure once engine is started.
Code P0446 could mean one or more of the following has happened:
Faulty vent valve
Open, short or excessive resistance on Vent valve control circuit.
So vent valve is most likely the source of the problem and causing the other two codes.
Finding the Vent valve location on a 2011 will be the issue, my best guess would be at the fuel tank.
The vent valve is just an on/off solenoid, it's hoses can get clogged as well, so open or closed has the same pressure which would trigger the EVAP CEL
These are most like cause by the above, best guess:
P0451 An improper voltage signal from EVAP control system pressure sensor is sent to Engine Control Module (computer).
P0453 the PCM (computer) noticed the EVAP Pressure sensor or FTP is indicating a higher than normal pressure (above 4.5 Volts) in the EVAP system
You can test the sensor:
Remove the gas cap(remove any pressure in the tank), and turn on the key, with the OBD II readers live scan check the voltage of the Fuel tank pressure sensor, should be about 2.5v with gas cap off.
If it is then problem is not the sensor, if it is above 4v then could be wires or bad sensor, you will need to access sensors connector to find out which