error code for 2002 1500 PO446

getting a warning light  "service engine soon" - checked with  scanning tool with a reply code PO446 - evap.  what could most likely to cause the problem.  thank you for your help

Google is your friend, as is the search function of the forum. It's been discussed dozens of times through the years. Just search on P0446 on Google or the forum and you will get the information you need.

  https://www.youtube.com/watch?v=pYbA_7YpYaM

Look here hope it helps