Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) MID 233 Fault code sent by MID 128 Engine control unit (cont’d.) ECM SPN 3245, Aftertreatment DPF Outlet Temperature – MID 128 PPID 436 57 FMI 9 • Abnormal update rate • Missing signal from NOx sensor • MIL illuminated • Yellow electronic malfunction lamp illuminated • Loss of communication from NOx sensor ECU and Engine Control Module (ECM) FMI 11 • Root cause not known • NOx sensor measures near zero for long time with high load • MIL illuminated • Faulty NOx sensor FMI 12 • Bad intelligent device or component • NOx-sensor signal corrupt (incorrect value) • MIL illuminated • Faulty NOx sensor FMI 13 • Out of calibration • NOx-sensor activation (incorrect value) • MIL illuminated • Faulty NOx sensor FMI 14 • Special instructions • Missing signal from sensor due to battery voltage • MIL illuminated • Voltage to NOx sensor is too high or too low • Faulty harness to sensor FMI 31 • Condition exists • Inlet NOx sensor error • Mismatch between sensors • MIL illuminated • Engine out NOx high • Faulty NOx sensor • Aftertreatment Diesel Exhaust Fluid (DEF) quality Type of fault:
FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 0 • Data valid but above normal operational range - Most severe level • Temperature critically too high • Low engine power • Restricted Catalyst • Intake air leak • Faulty sensor FMI 2 • Data erratic, intermittent or incorrect • Sensor is not rational (plausibility) • MIL illuminated • Regeneration not possible • Faulty sensor • Exhaust system leak • Faulty harness connectors or connections FMI 4 • Voltage below normal, or shorted to low source • Short to ground on the metering side of the circuit • MIL illuminated • Regeneration not possible • Faulty harness • Faulty sensor • Aftertreatment control module (ACM)