I am at my witz end with this. I have the infamous bank too lean codes again!!! Every winter I go through this and I am pretty sure I am out of things to change, I've done that pcv elbow or what ever its called, I've done intake gaskets and isolator bolts I've changed hoses. I am running out of things to change. The truck itself is well taken care of its just that I cant understand why every year the truck runs fantastic till winter comes around then boom check engine light. The bad thing is I have an emissions test to pass so u can understand why this I so annoying. Anyone have any ideas as why this is becoming an annual ordeal

 

Forgot sorry its a 4.2 l 03 scab m05