On the 2005 Toyota 4Runner, the P0441 is a very general code simply stating there is a problem somewhere in the EVAP System. The P2420 narrows this down a bit to the EVAP Vent Valve. The Valve Valve is built into and part of the Pump Module, located at the top of the fuel tank, between the Air Filter and the EVAP Canister. Carefully inspect the rubber lines for any cracks, holes or disconnections. Inspect the electrical connector and wire harness for any loose, broken or damaged wires. If the visual inspection checks ok, the Pump Module will need to be replaced.
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