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P0327 - O2 sensor and knock sensor

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23K views 6 replies 5 participants last post by  crazychevy  
My truck got rebuilt new cam,crank, lifters, pistions,and rods. truck runs great but first 2 codes to come on are PO327 (knock sensor) and O2 sensor ( PO141) replaced O2 sensor and went away for a while till now.But the knock sensor has not gona away, it always comes back after a few days of clearning with my scan tool. any help?