International Fault Code SPN 629 FMI 31: Controller #1 : Condition Exists

Code details

Manufacturer

International (Navistar)

Applies to

International A26 (2024–2025)

Fault code

SPN 629 FMI 31

J1939 SPN

629

FMI

31 — Condition exists

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 31 tells the shop the type of failure to test for: condition exists.
• Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.

Related fault codes

• International Fault Code SPN 629 FMI 0 — ECM Error – CPU Load Excessively HIGH
• International Fault Code SPN 629 FMI 12 — ECM Internal Chip Error
• International Fault Code SPN 629 FMI 8 — ECM Error – Engine Off Timer Fault
• International Fault Code SPN 629 FMI 0 — Controller #1 : Data Valid But Above Normal Operational Range – Most Severe Level
• International Fault Code SPN 629 FMI 12 — Controller #1: Bad Intelligent Device Or Component
• International Fault Code SPN 629 FMI 15 — Controller #1: Data Valid But Above Normal Operating Range – Least Severe Level
• Cummins Fault Code 111 — Engine Control Module – Critical internal failure
• Cummins Fault Code 343 — Engine Control Module - Warning internal hardware failure