International Fault Code SPN 4334 FMI 15: Aftertreatment 1 Diesel Exhaust Fluid Doser 1 Absolute Pressure: Data Valid But Above Normal Operating Range – Least Severe Level

Code details

Manufacturer

International (Navistar)

Applies to

International A26 (2024–2025)

Fault code

SPN 4334 FMI 15

J1939 SPN

4334

FMI

15 — Data valid but above normal range (least severe)

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 15 tells the shop the type of failure to test for: data valid but above normal range (least severe).
• 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 4334 FMI 16 — Aftertreatment 1 Diesel Exhaust Fluid Doser 1 Absolute Pressure: Data Valid But Above Normal Operating Range – Moderately Severe Level
• International Fault Code SPN 4334 FMI 18 — Aftertreatment 1 Diesel Exhaust Fluid Doser 1 Absolute Pressure: Data Valid But Below Normal Operating Range – Moderately Severe Level
• International Fault Code SPN 4334 FMI 2 — Aftertreatment 1 Diesel Exhaust Fluid Doser 1 Absolute Pressure: Data Erratic, Intermittent Or Incorrect
• International Fault Code SPN 4334 FMI 20 — Aftertreatment 1 Diesel Exhaust Fluid Doser 1 Absolute Pressure: Data Drifted High
• International Fault Code SPN 4334 FMI 3 — Aftertreatment 1 Diesel Exhaust Fluid Doser 1 Absolute Pressure: Voltage Above Normal, Or Shorted To High Source
• International Fault Code SPN 4334 FMI 4 — Aftertreatment 1 Diesel Exhaust Fluid Doser 1 Absolute Pressure: Voltage Below Normal, Or Shorted To Low Source
• International Fault Code SPN 4334 FMI 7 — Aftertreatment 1 Diesel Exhaust Fluid Doser 1 Absolute Pressure: Mechanical System Not Responding Or Out Of Adjustment
• PACCAR Fault Code P3847 — Pump Module Pressure – Voltage Too High or Short Circuit to Supply on ECU (D442) Pin (12)