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.