2003 xterra fault code p0455

[asutch]

need help have 2003 xterra got code po455 large evap leak replaced cap same code replaced vent control valve located on evap canister code returned after 3 key cycles.cked all hoses not sure where to go from here.also my evap can is over the spare tire not in the fender well so maybe the problem with dirt in the vent valve is not this model. still getting code though any help would be great.zeropost?cmd=newtopic&id=36#