Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 3556, Aftertreatment Hydrocarbon Doser/ MP7 Engine MID 128 PPID 329 ECM SPN 3597, Aftertreatment Diesel Particulate Filter (DPF) Regeneration too Frequent MID 128 PSID 119 74 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 3 • Voltage above normal, or shorted to high source • Circuit shorted to + • MIL illuminated • Yellow electronic malfunction lamp illuminated • Regeneration not possible • Faulty harness • Faulty connector • Aftertreatment DPF control valve failure FMI 4 • Voltage below normal, or shorted to low source • Circuit shorted to – • MIL illuminated • Yellow electronic malfunction lamp illuminated • Regeneration not possible • Faulty harness • Faulty connector • Aftertreatment DPF control valve failure FMI 5 • Current below normal or open circuit • Open circuit • MIL illuminated • Yellow electronic malfunction lamp illuminated • Regeneration not possible • Faulty harness • Faulty connector • Aftertreatment DPF control valve failure Type of fault:
FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 3 • Voltage above normal, or shorted to high source • Circuit shorted + • MIL illuminated • Faulty harness • Faulty connector • Aftertreatment DEF line heater 1 or 3 failure • Aftertreatment DEF pump assembly failure • Aftertreatment DEF tank heating valve failure • Aftertreatment Control Module (ACM)