Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 3485, Aftertreatment Diesel Particulate Filter (DPF) Atomization Air Pressure MID 128 PPID 277 68 FMI 1 • Data valid but below normal operational range - Most severe level • N/A • MIL illuminated • Yellow electronic malfunction lamp illuminated • Aborted regeneration • Faulty harness • Faulty aftertreatment DPF coil FMI 2 • Data erratic, intermittent or incorrect • N/A • MIL illuminated • Yellow electronic malfunction lamp illuminated • Aborted regeneration • Faulty harness • Faulty aftertreatment DPF coil FMI 3 • Voltage above normal, or shorted to high source • Circuit shorted to + • MIL illuminated • Yellow electronic malfunction lamp illuminated • Aborted regeneration • Faulty harness • Faulty aftertreatment DPF coil FMI 4 • Voltage below normal, or shorted to low source • Circuit shorted to – • MIL illuminated • Yellow electronic malfunction lamp illuminated • Aborted regeneration • Faulty harness • Faulty aftertreatment DPF coil FMI 5 • Current below normal or open circuit • Open circuit • MIL illuminated • Yellow electronic malfunction lamp illuminated • Aborted regeneration • Faulty harness • Faulty aftertreatment DPF coil Type of fault:
FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 2 • Data erratic, intermittent or incorrect • Aftertreatment DPF differential pressure too low • MIL illuminated • Yellow electronic malfunction lamp illuminated • Regeneration not possible • Soot build up • Faulty sensor • Aftertreatment DPF air shutoff valve stuck