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Originally Posted by timssail
codes on this problem came up as P404 Exhaust gas recirculation circuit range/performance. P 405 Exhaust gas recirculation sensor A circuit low. The mechanic cleaned the EGR valve and the truck runs fine now but the SEL is still on.
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you may want to look into adding a oil catch can. the way they send the exhaust gas thru the manifold makes the motor filthy. when i pulled my manifold it looked like the inside of a bbq pit.