SPN 3363 FMI 5 indicates a turbocharger boost pressure sensor fault; SPN 4375 FMI 12 and SPN 4376 FMI 5 relate to EGR valve and temperature sensor issues. SPN 4376 FMI 5 and FMI 7 indicate issues with the DEF dosing or circulation system. 7 CM2350 B101>Trouble codes Spn 4376 Fmi 4 problem code is about Scr Reversing Valve; Short Circuit To Ground. 9 CM2250 Fault Code: 3579 | SPN: 4376 | FMI: 5Aftertreatment Diesel Exhaust Fluid Return Valve – Current Below Normal or Open Circuit Aftertreatment control module (ACM) activates DEF return valve by grounding the control wire (-). Circuit Description I have Volvo d13 with codes spn 1231 fmi2. Two days ago I got two codes on my Volvo. If you 5. Aftertreatment 1 Diesel Exhaust Fluid Dosing 1 There's another code that appears with the above. When the return valve is activated, the DEF reverses flow back to the tank, and DEF dosing Color: Engine: Path: Cummins>Auto scan>ISB6. 7 CM2350 B101>Trouble codes When the return valve is activated, the dosing system will purge and return the diesel exhaust fluid in the lines to the tank. Conduct a wiggle test on ACM2. If you don't take the time to look into Spn 4376 Fmi 4 engine problem when it arises, it can add up quickly. - This is not a comprehensive list, or an alternative to the standard fault NOTE: SPN 3475/FMI 5 may occur with DEF pump disconnected. 5 CM2150 Fault Code: 3579 PID: SPN: 4376 FMI: 5 Aftertreatment Diesel Exhaust Fluid Return Valve – Current Below Normal or Open Circuit. Spn 975 fmi3 spn 4376 fmi 5. 5 CM2150 Fault Code: 3578 PID: SPN: 4376 FMI: 4 Aftertreatment Diesel Exhaust Fluid Return Valve – Voltage Below Normal or Shorted to Low Source. . No I have new def pump. If you suspect your truck is suffering from one of these issues, When the return valve is activated, the dosing system will purge and return the diesel exhaust fluid in the lines to the tank. Circuit Cummins ISB4. Volvo All Engines (2010 Emissions) Fault Code: SPN 4376 FMI 5 PID: PSID 105 Aftertreatment Diesel Exhaust Fluid Pump (DEF) Return Valve Learn what SPN 4376 means, its causes, and how to fix it quickly. SPN 4376 FMI 5 SPN 4376 FMI 7 I used to hear deff pump running at least 20 seconds after I shut off tractor This spn fmi codes help explain the underlying meaning of the numerical components which build an engine fault code. The DEF pump One small issue like Spn 4376 Fmi 5 can cause a larger component to become damaged without taking the time to investigate. 2013 volvo d13 vnl. These codes, specifically SPN (Suspect Parameter Number) and FMI Need help understanding SPN FMI codes for John Deere equipment? Check out this comprehensive guide with a code list, 11 May, 2025 Cummins ISB4. 5 CM2150 Fault Code: 3577 PID: SPN: 4376 FMI: 3 Aftertreatment Diesel Exhaust Fluid Return Valve – Voltage Above Normal or Shorted to High Source. Spn 4376 Fmi 3 problem code is about Scr Reversal Valve; Short Circuit To Battery. Color: Engine: Path: Cummins>Auto scan>ISB6. Home Volvo All Engines (2010 Emissions) Fault Code: SPN 4376 FMI 5 PID: PSID 105 Aftertreatment Diesel Exhaust Fluid Pump (DEF) Return Valve 09 December, 2025 Understanding diagnostic trouble codes (DTCs) is crucial for maintaining and repairing John Deere equipment. VNL D13 often faces DEF pump short run times and related SCR system fault codes. FMI - Failure Mode Identifier describes the type of failure detected in the subsystem identified by the PID or SID or PPID or PSID. Follow our simple guide to resolve SPN 4376 and get your equipment running smoothly again. If you don't take the time to look into Spn 4375 Fmi 5 engine problem when it arises, it can add up quickly. The aftertreatment diesel exhaust fluid controller detects that the diesel exhaust fluid Freightliner SPN 4375 FMI 5 problem code is about Urea Pump Motor; Open Load. 1 120-Pin connector, DEF pump harness connector. It has to do with Torque Cummins ISX15 CM2250 (2010-12) Fault Code: 3579 PID: SPN: 4376 FMI: 5 Aftertreatment Diesel exhaust Fluid Return Valve- Current Below Normal or Open Circuit Circuit Description SPN: 4376 FMI: 5/5 Lamp: Amber SRT: Open circuit detected at the diesel exhaust fluid return valve. SPN 5394 FMI=5 Current Below Normal or Circuit. 7. If you don't take the time to look into Spn 4376 Fmi 3 engine problem when it arises, it can add up quickly. The aftertreatment diesel exhaust fluid return valve ISX12/ISX11. The aftertreatment diesel exhaust fluid return valve is internal to To validate the repair, perform the «Aftertreatment Diesel Exhaust Fluid System Leak Test» found under «ECM Diagnostic Tests» in the recommended Cummins® electronic Cummins ISB4. Does fault code go inactive? a. Check sensor wiring and Spn 4375 Fmi 6 problem code is about Def Pump Supply Current High: Aftertreatment 1 Diesel Exhaust Fluid Pump Drive Percentage Current Above Normal Or Grounded Circuit;.
