I replace the vent valve but still get the check engine light

What is your question?

04 Nissan Pathfinder I replace vent valve but still get the check engine light, the codes is P0455 still come on, does the canister goes bad or could it be another valve?

What makes this problem better or worse?

Need to pass emissions

How long has your 2004 Nissan Pathfinder had this problem?

A year