I attached the diagram for these codes. I would suggest following the P0453 first and seeing if that fixes both. If not, then you can perform the other which should take care of it.
I assume you measured on the fuel tank pressure sensor and got 4.7 volts? If this is the case then you need to move onto step HX20. I highlighted what you need because you don't have the codes mentioned so you need to proceed and measure resistance on the harness from the PCM to the FTPS.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.