International Fault Code SPN 3516 FMI 12: Aftertreatment 1 Diesel Exhaust Fluid Concentration: Bad Intelligent Device Or Component

Code details

Manufacturer

International (Navistar)

Applies to

International A26 (2024–2025)

Fault code

SPN 3516 FMI 12

J1939 SPN

3516

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.

Related fault codes

• International Fault Code SPN 3516 FMI 10 — Aftertreatment 1 Diesel Exhaust Fluid Concentration: Abnormal Rate Of Change
• International Fault Code SPN 3516 FMI 15 — Aftertreatment 1 Diesel Exhaust Fluid Concentration: Data Valid But Above Normal Operating Range – Least Severe Level
• International Fault Code SPN 3516 FMI 3 — Aftertreatment 1 Diesel Exhaust Fluid Concentration: Voltage Above Normal, Or Shorted To High Source
• International Fault Code SPN 3516 FMI 9 — Aftertreatment 1 Diesel Exhaust Fluid Concentration: Abnormal Update Rate
• PACCAR Fault Code P3822 — DEF Quality – DEF Concentration Too Low
• PACCAR Fault Code P3824 — DEF Quality – DEF Concentration Too High