Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 412, Engine Exhaust Gas Recirculation Temperature – MID 128 PID 412 30 FMI 5 • Current below normal or open circuit • Open in the 5 volt supply line • Short to ground in metering line • Open in the metering line • MIL illuminated • Engine derate • Faulty EGR differential pressure sensor connector • Faulty EGR differential pressure sensor harness • Faulty EGR differential pressure sensor FMI 7 • Mechanical system not responding or out of adjustment • EGR differential pressure sensor is read either to high or too low. (Abnormal value).
• MIL illuminated • Engine derate • Faulty EGR differential pressure sensor connector • Faulty EGR differential pressure sensor harness • Faulty EGR differential pressure sensor • EGR valve • EGR valve leak • Clogged venturi Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 0 • Data valid but above normal operational range - Most severe level • Engine Exhaust Gas Recirculation Temperature is above range • Engine derate • Extreme driving conditions • EGR cooler failure FMI 2 • Data erratic, intermittent or incorrect • EGR temperate signal, believed to be not valid (plausibility fault) • MIL illuminated • Engine derate • Faulty sensor FMI 4 • Voltage below normal, or shorted to low source • Short to ground on the metering side of the EGR Sensor circuit • MIL illuminated • Engine power will be derated according to the error torque map • Faulty EGR Temperature Sensor connector • Faulty EGR Temperature Sensor harness • Faulty EGR Temperature Sensor FMI 5 • Current below normal or open circuit • Short to battery in the metering side of the EGR Sensor circuit • Open in the metering side of the EGR Sensor circuit • Open circuit in the ground line of the EGR Sensor circuit • MIL illuminated • Engine derate • Faulty EGR Temperature Sensor connector • Faulty EGR Temperature Sensor harness • Faulty EGR Temperature Sensor