error code, please help

I have a 2002 toyota tacoma 4x4 SR5. Last week it started at the gas pump, the gas pump kept clicking off every 3 seconds or so. Today the check engine light came on, went to autozone and got the error code (PO446, evap, emissions control system, vent circuit malfunction. any help would be great. thanks Louis

http://www.autoshop101.com/forms/h62.pdf

Check for vacuum hose cracks, holes blocked for vacuum hoses, damaged connectors or disconnected hoses.
Open or short in vapor pressure sensor circuit
Vapor pressure sensor
Open or short in VSV circuit for EVAP
VSV for EVAP
Open or short in VSV circuit for vapor pressure sensor
VSV for vapor pressure sensor
Charcoal canister cracks, holes, or damage.

Make sure your gas cap is tight. Cory