International Fault Code SPN 626 FMI 3: Engine Start Enable Device 1: Voltage Above Normal, Or Shorted To High Source

Code details

Manufacturer

International (Navistar)

Applies to

International A26 (2024–2025)

Fault code

SPN 626 FMI 3

J1939 SPN

626

FMI

3 — Voltage above normal, or shorted to high source

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 3 tells the shop the type of failure to test for: voltage above normal, or shorted to high source.
• Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.

Related fault codes

• International SA 33 SPN 626 FMI 5 — Fuel Heater Relay Under Current Or Open Circuit
• International SA 33 SPN 626 FMI 6 — Fuel Heater Relay Over Current
• International Fault Code SPN 626 FMI 4 — Engine Start Enable Device 1: Voltage Below Normal, Or Shorted To Low Source
• International Fault Code SPN 626 FMI 5 — Engine Start Enable Device 1: Current Below Normal Or Open Circuit
• Cummins Fault Code 381 — Intake Air Heater (Relay Enable) #1 Circuit - data incorrect
• Cummins Fault Code 382 — Intake Air Heater (Relay Enable) #2 Circuit - data incorrect
• Cummins Fault Code 384 — Start Assist Device Control Circuit Error (Ether Injection)
• Cummins Fault Code 487 — Start Assist Device - Canister Empty (Ether Injection)