International (Navistar)
J1939 SPN/FMI
SPN 609 / FMI 12
International Fault Code SPN 609 FMI 12: DCU Internal Chip Error
SPN 609 FMI 12 on International / Navistar trucks means: DCU Internal Chip Error. The failure mode (FMI 12) is “bad intelligent device or component”.
Code details
- Manufacturer
- International (Navistar)
- Applies to
- International MaxxForce DT (2010–2019)
- Fault code
- SPN 609 FMI 12
- J1939 SPN
- 609
- FMI
- 12 — Bad intelligent device or component
- Truck models in source
- 3200, 4100, 4300, 4400, 7300, 7400, 7500, 7600, 7700, 8500, 8600, BE 200, CE Bus, CXT, DuraStar, LoneStar, MXT, ProStar, RXT, TranStar, WorkStar
What to do next
- Read active and inactive codes with the OEM service tool (Diamond Logic Builder can clear previously active codes) and note the occurrence count.
- FMI 12 tells the shop the type of failure to test for: bad intelligent device or component.
- Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.
Get this code diagnosed
Send one request and nearby diesel shops and mobile mechanics can quote the repair.
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Related fault codes
- International Fault Code SPN 609 FMI 19 — DCU Not Detected on J1939
- International Fault Code SPN 609 FMI 3 — DCU Switched Voltage Too HIGH
- International Fault Code SPN 609 FMI 4 — DCU Switched Voltage Too LOW
- Cummins Fault Code 184 — Engine Control Module Identification Input State Error
- PACCAR Fault Code P3862 — CAN Communication – Timeout From Engine Management System
- PACCAR Fault Code P3875 — EAS-4 ECU – Data Lost Due to Incorrect Power Down
- PACCAR Fault Code P3876 — EAS-4 ECU – Internal Error
- PACCAR Fault Code P3882 — EAS-4 ECU – Voltage Too High or Short Circuit to Supply on ECU (D442) Pin (31) or Pin (46) or Pin (47)
Source: International MaxxForce DT 2010–2019 fault code list (Diesel Laptops). See also OBD-II codes.