You can pull the manifold heat shield off to check for a crack. They ALL crack eventually, my '01 manifolds were cracked at 65K miles. I don't remember what code mine threw, but i don't think it was the same one your getting.


2001Sport 3.0-Headers-Cage-RoofChop-NP231/D300-D44/ARB-Ford9/Yukon/3Link-37's+H1's-PSC Assist-108:1