Cummins ISB4.5 CM2150 Fault Code: 3749 PID: SID 254 SPN: 3226 FMI: 20 Aftertreatment Outlet NOx Sensor – Data Not Rational – Drifted High.
Circuit DescriptionThe aftertreatment outlet NOx (nitrogen oxides) sensor is a smart device and communicates with the engine control module (ECM)...