New to forums,Working on my daughter 01 Legacy ,first sub .Did head gaskets earlier this year, a little hesitation first off the throttle but run good on top end 02 sensors were bad but ran good recently went for state inspection failed because of sensors but were bad last year .Installed new sensors cats are good ran fine until warmed up threw a p0341 code replaced still code is there sensor ohmed okay plugs are black .Any advice would greatly appreicated , also timing is right on thank you in advance and everything was new belt ,plugs pulleys water pump tensioner
