Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 173, Engine Exhaust Gas Temperature (EGT) – MID 128 PID 173 24 FMI 9 • Abnormal Update Rate • Key ON, Ambient Air Temperature message missing on SAE J1587 data link • N/A • Faulty instrument cluster • Faulty harness FMI 10 • Abnormal rate of change • Ambient Temperature sensor signal fault • MIL illuminated (13L engine only) • Faulty instrument cluster FMI 12 • Bad intelligent device or component • Loss of SAE J1939 data link communication between Engine Control Module and Instrument Cluster Control Module • MIL illuminated (13L engine only) • Faulty instrument cluster • Faulty harness FMI 13 • Out of calibration • Ambient Temperature sensor signal fault • No ambient temperature calculated by Vehicle ECU • No valid ambient temperature received by Engine Control Module • MIL illuminated (13L engine only) • Faulty instrument cluster/harness or cluster harness connectors FMI 14 • Special instructions • Ambient Temperature sensor signal fault • MIL illuminated • Ambient Temperature sensor signal missing from Vehicle ECU FMI 19 • Received network data in error • Ambient Temperature sensor signal fault • MIL illuminated (13L engine only) • Faulty 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 Temperature is critically high • Engine derate • Poor driveability • Regeneration is not possible • Faulty harness • Faulty harness connector • Intake air leak FMI 2 • Data erratic, intermittent or incorrect • Sensor is not rational • MIL illuminated • Regeneration is not possible • Faulty harness • Faulty harness connector • Exhaust leak • Intake air leak • Sensor failure