My 2012 F-150 Platinum w/ 3.5 Ecoboost engine just passed 250K miles and has been a GREAT truck requiring nothing but routine maintenance, but today, with a FULL tank of gas, the "Wrench" dash light came on, the gas gauge shows to be empty, and it has the following codes:

1. P0446: Evaporative Emission System Vent Control Circuit
2. P0452: Evaporative Emission System Pressure Sensor/Switch Low Input
3. P0453: Evaporative Emission System Pressure Sensor/Switch High Input

It has no acceleration and has died at idle multiple times.

I don't know where to start...

Any suggestions?

Thanks in advance