EVAP error codes P0440 & P1448

I've got a 98 Nissan Sentra 1.6L. I extracted two codes, P0440 and P1448.

From what I found on the internet, the P1448 has something to do with the EVAP vent control valve. P0440 maybe also because of the 1448 code.

Can anyone give a better explaination of what might be wrong. If it is a malfunctioning valve, which valve is it becuase looking at the emissions diagram under the hood has nothing called "vent control valve".

Thanks,
Omar