Spn 3223 Fmi 7 Detroit, WARNING!!: ⚠️⚠️⚠️ Always use Detroit DD13 GHG14 (2014-16) Fault Code: SPN 3216 FMI 4 (ACM) Selective Catalyst Reduction Inlet NOx Sensor Circuit Failed Low Detroit DD13 GHG14 (2014-16) Fault Code: SPN 3216 FMI 3 (ACM) If you see the 520363 fault code along with the SPN 3223 FMI 7 code, then that means "Selective Catalyst Reduction Inlet NOx Sensor Circuit Code SPN 3223 FMI 7 is a fault code indicating a fault in the aftertreatment hydrocarbon (HC) doser. Learn what dashboard warning lamps mean and how to perform a parked I have a 17 Freightliner Cascadia and just got a fault code spn 3223 fmi 7. Inlet outlet Nox sensor problem fault code spn 3223 fmi 7 spn 3238 fmi 2 diagnostic repair DD13 DD15. Identify SPN & FMI errors for ACM, MCM, and CPC modules. The document outlines the troubleshooting steps for a NOx Inlet Sensor failure (SPN 3223/FMI 7) in vehicles. Once engine is at standard operating temperature, drive at highway speed with loaded trailer above 1130 rpm continuously for twenty SPN 3223 FMI 7 indicates a NOx sensor circuit fault, often due to wiring issues, sensor contamination, or sensor failure. It details the conditions for monitoring, inspection Continuous when enabling conditions met. Begin by inspecting the NOx sensor wiring harness for damage or corrosion. Now let’s delve deeper into what this code means and how it affects your One small issue like Spn 3223 Fmi 7 can cause a larger component to become damaged without taking the time to investigate. Does anyone know what this is?.