Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 252, Date MID 128 PID 252 ECM SPN 411, Engine Exhaust Gas Recirculation Differential Pressure – MID 128 PID 411 29 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 9 • Abnormal update rate • Time stamp from cluster isn’t available. • Date data message missing on SAE J1587 data link. (Cluster error). • N/A • Instrument Cluster Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 0 • Data valid but above normal operational range - Most severe level • Exhaust Gas Recirculation (EGR) differential pressure sensor output reading too high.
(abnormal value) • MIL illuminated • Engine derate • Faulty harness • Faulty harness connector • Faulty sensor • EGR leakage • Clogged EGR cooler FMI 1 • Data valid but below normal operational range - Most severe level • Exhaust Gas Recirculation (EGR) differential pressure sensor output reading too low. (abnormal value) • MIL illuminated • Faulty harness • Faulty harness connector • Faulty sensor • Clogged venturi FMI 2 • Data erratic, intermittent or incorrect • Only used to control EGR valve.
• N/A • N/A FMI 3 • Voltage above normal or shorted to high source • Short to battery in metering line • Open in the ground circuit • MIL illuminated • Engine derate • Faulty EGR differential pressure sensor connector • Faulty EGR differential pressure sensor harness • Faulty EGR differential pressure sensor