Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 175, Engine Oil Temperature 1 – MID 128 PID 175 25 FMI 4 • Voltage below normal, or shorted to low source • Short to ground on the metering side of the circuit • MIL illuminated • Regeneration is not possible • Sensor failure • Faulty harness • Faulty harness connector • Aftertreatment control module (ACM) FMI 5 • Current below normal or open circuit • Short to battery on the metering side of the circuit • Open in the metering side of the circuit • Open in the ground side of the circuit • MIL illuminated • Faulty harness • Sensor failure • Faulty harness connector FMI 15 • Data valid but above normal operating range - Least severe level • Sensor out of range • Sensor indicates a invalid value • MIL illuminated • Sensor failure • Faulty harness FMI 16 • Data valid but above normal operating range - Moderately severe level • Exhaust Gas Temperature is moderately too high • Engine derate • Poor driveability • Faulty harness • Faulty harness connector • Intake air leak Type of fault:
FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 0 • Data valid but above normal operational range - Most severe level • Extreme driving conditions • Engine oil temperature critically above range • Red engine shutdown lamp illuminated • Engine derate • Extreme driving conditions • Engine cooling fan • Oil thermostat • Coolant system • Clogged oil cooler FMI 2 • Data erratic, intermittent or incorrect • Engine oil temperature sensor indicating too high or too low a value (abnormal value) • MIL illuminated (13L engine only) • In some cases may have an effect on driveability • Engine Oil Temperature (EOT) sensor failure • Faulty harness FMI 4 • Voltage below normal, or shorted to low source • Short circuit -, measuring line • MIL illuminated (13L engine only) • Yellow electronic malfunction lamp illuminated • Engine Oil Temperature (EOT) sensor failure • Faulty harness