2001 Nissan Pathfinder P0445 and P1448

[Chris_L]

My pathfinder has been tripping this code combo for a while. Based on research here and reading the manual I decided that I needed to replace the EVAP canister and the EVAP control valve. I went ahead and replaced the canister and valve and the error still comes back after ~50 miles of driving. What is the next step to troubleshoot/replace?

I am confused since the dealer was going to replace the same parts.

Thanks

Chris