Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 1677, Aftertreatment DPF Auxiliary Heater Mode MID 128 PSID 25 ECM SPN 1761, Aftertreatment Diesel Exhaust Fluid (DEF) Tank Level PPID 278 51 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 0 • Data valid but above normal operational range — most severe level • Truck has idled too long without completing a periodic heat mode • Red engine shutdown lamp illuminated • Engine derate • High temperature spikes in DPF when driving is resumed or during stationary regeneration • Extremely cold ambient temperatures • PTO operated with limited exhaust temperatures • Engine turbocharger • Engine turbocharger compressor bypass valve FMI 7 • Mechanical system not responding or out of adjustment • Truck has idled too long without completing a periodic heat mode • Yellow electronic malfunction lamp illuminated • White exhaust smoke • High temperature spikes in DPF when driving is resumed or during stationary regeneration • Extremely cold ambient temperatures • PTO operated with limited exhaust temperatures • Engine turbocharger • Engine turbocharger compressor bypass valve FMI 16 • Data valid but above normal operating range - Moderately severe level • Truck has idled too long without completing a periodic heat mode • Yellow electronic malfunction lamp illuminated • White exhaust smoke • High temperature spikes in DPF when driving is resumed or during stationary regeneration • Extremely cold ambient temperatures • PTO operated with limited exhaust temperatures • Engine turbocharger • Engine turbocharger compressor bypass valve Type of fault:
FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 3 • Voltage above normal, or shorted to high source • Short circuit high side • N/A • DEF tank pickup assembly/sensor failure FMI 5 • Current below normal or open circuit • Short circuit + • Open circuit • Yellow electronic malfunction lamp illuminated • DEF tank pickup assembly/sensor failure