My daughter has a 2001 Chevy Impala 3.8L

Check Engine Light came on and I hooked up code reader. First let me put this out there..... I am nowhere near a mechanic but I can perform basic repairs in my opinion.

After scanning with code reader it showed a P0446 code which I know deals with the emissions evap system. My first and cheapest course of action was to replace the fuel cap since she said the check engine light appeared after getting gas. That didnt do it so my next step was that I replaced the canister purge valve under the hood. I reset the code and after driving for a while the check engine light came back on.

Looking for any recommendations on what my next course of action should be. I plan on checking hoses next but dont want to keep replacing parts that are not bad.

Thanks in advance

Also not noticing any performance issues or odors with vehicle