Having problems with your 2002 Buick Century ?
Code PO446 - Evaporative Emission System Vent Control Circuit, what that means and how to repair it.
The evap canister has a valve on it check the pigtail on the valve and make sure its plugged in good . there is a fuse for it as well . if the fuse is good and the plug is tight . replace valve . Its common for these to go bad .
Repair Help & Product Troubleshooting for 2002 Buick Century
Tips for a great answer:- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.