International Fault Code SPN 3246 FMI 2: Aftertreatment 1 Diesel Particulate Filter Outlet Temperature: Data Erratic, Intermittent Or Incorrect

Code details

Manufacturer

International (Navistar)

Applies to

International A26 (2024–2025)

Fault code

SPN 3246 FMI 2

J1939 SPN

3246

FMI

2 — Data erratic, intermittent or incorrect

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 2 tells the shop the type of failure to test for: data erratic, intermittent or incorrect.
• 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 3246 FMI 2 — DPFOT Signal – Erratic, Intermittent, or Incorrect
• International Fault Code SPN 3246 FMI 20 — DPFOT Signal – Drifted HIGH
• International Fault Code SPN 3246 FMI 21 — DPFOT Signal – Drifted LOW
• International Fault Code SPN 3246 FMI 3 — DPFOT Signal – Out of Range HIGH
• International Fault Code SPN 3246 FMI 4 — DPFOT Signal – Out of Range LOW
• International Fault Code SPN 3246 FMI 7 — DPFOT – Not Warming Along with Engine
• International Fault Code SPN 3246 FMI 0 — Aftertreatment 1 Diesel Particulate Filter Outlet Temperature: Data Valid But Above Normal Operational Range – Most Severe Level
• International Fault Code SPN 3246 FMI 12 — Aftertreatment 1 Diesel Particulate Filter Outlet Temperature: Bad Intelligent Device Or Component