![]() For a specific engine manufacturer's explanation for codes, please consult the engine's technical manual. Note: This description represents text descriptions for faults supported by another coding system and does not necessarily comply with SAE J1939. If you suspect your truck is suffering from one of these issues, look into replacing those small components to save money down the road. One small issue like Spn 4374 Fmi 0 can cause a larger component to become damaged without taking the time to investigate. NOTE: This code sets when SPN 5246/FMI 16 has been present for one hour of idle time, the vehicle has been restarted or six gallons of fuel has been used. If you don't take the time to look into Spn 4374 Fmi 0 engine problem when it arises, it can add up quickly. ECM: Detroit - DD15 GHG14 (2014-16) Fault: SPN 5246 FMI 0 (ACM) SPN: 5246. The 3361/FMI 7 code, is more then likely your metering unit is stopped up and needs. ![]() Note: (EPA10 ONLY) If SPN 5246/FMI 0, 15 or 16 are the only fault (s) present, follow troubleshooting procedure for SPN 3361/FMI 7 (DEF Unit - Unable to clear Restriction). Spn 4374 Fmi 0 problem code is about Under Pressurized Def System: Aftertreatment 1 Diesel Exhaust Fluid Pump Motor Speed Data Valid But Above Normal Operational Range - Most Severe Level Diagnosed Urea Pump Speed Signal Range Failed High. This diagnostic code is typically Regulatory Fault Ignored - Derate On. Under Pressurized Def System: Aftertreatment 1 Diesel Exhaust Fluid Pump Motor Speed Data Valid But Above Normal Operational Range - Most Severe Level Diagnosed Urea Pump Speed Signal Range Failed High
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