Difficult To Refuel

Check Fuel Tank Vapor Control Valve (FT-VCV). See appropriate SELF-DIAGNOSTICS article.
Check fuel tank vapor signal tube between fuel pipe and FT-VCV.
Check fuel tank vapor vent tube between EVAP canister and FT-VCV.
Check EVAP canister. See appropriate SELF-DIAGNOSTICS article.
Check for malfunctioning service station fill nozzle.