i have a 01 s10 exterm and the service engine light came on and it says p0446.

What is your question?

the code says emmisson control system vent circuit malfuction and i need to know what part needs to be replaced because its getting aggervating to haft to keep on turning the light off every time it comes on. the truck has a v6 in it. the light comes on like 2 to 3 times a week