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2015 MRU P0406 & P0108

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Little history on truck, new engine wiring harness that's junk, 3 ECMs swapped out. So i figured out most of the other issue by myself. Just having problems trying to diagnosing these last 2 codes before replacing the engine harness again. New pressure differential sensor, new intake sensor. EGR valve is getting voltage, sensor lines for EGR sensor are clean. BTW, I'm new here. so any help would be greatly appreciate!!   

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