Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 108, Barometric Pressure – MID 128 PID 108 ECM SPN 110, Engine Coolant Temperature – MID 128 PID 110 20 FMI 13 • Out of Calibration • The sensor output is showing a constant value • Engine derate • Minor cold engine smoke • MIL illuminated • Engine Intake Manifold sensor • Faulty harness • Faulty harness connector FMI 17 • Data valid but below normal operating range - Least severe level • The sensor output is showing a constant value • Engine derate • Minor cold engine smoke • MIL illuminated • Engine Intake Manifold sensor • Faulty harness • Faulty harness connector Type of fault: FMI Description: Fault Condition:
Possible Symptoms: Possible Cause: FMI 2 • Data erratic, intermittent or incorrect • Barometric Pressure sensor output is too high or too low • Minor engine derate • MIL illuminated • Faulty Sensor • Faulty Engine Control Module FMI 3 • Voltage above normal, or shorted to high source • Short to battery on the metering side • MIL illuminated • Internal fault in the Engine Control Module • Faulty Sensor FMI 4 • Voltage below normal, or shorted to low source • A short to ground on the metering side • MIL illuminated • Internal fault in the Engine Control Module • Faulty Sensor Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 0 • Data valid but above normal operational range - Most severe level • Coolant temperature indicates critical limit • Engine derate • Red engine shutdown lamp illuminated • Extreme driving condition • Faulty coolant thermostat • Malfunctioning fan • Blocked radiator FMI 2 • Data erratic, intermittent or incorrect • Engine Coolant Temperature sensor output is too high or too low • May affect driveability in extreme cases • MIL illuminated • Faulty Sensor • Faulty harness • Faulty coolant thermostat FMI 4 • Voltage below normal or shorted low • Engine Coolant Temperature sensor voltage too low • Difficult to start in cold climates • Idle run regulation is deteriorated • MIL illuminated • Faulty Sensor • Faulty harness FMI 5 • Current below normal or open circuit • N/A • Difficult to start in cold climates • Idle run regulation is deteriorated • MIL illuminated • Faulty Sensor • Faulty harness