International Fault Code SPN 172 FMI 3: IAP Signal – Out of Range HIGH

Code details

Manufacturer

International (Navistar)

Applies to

International MaxxForce DT (2010–2019)

Fault code

SPN 172 FMI 3

J1939 SPN

172

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 Fault Code SPN 172 FMI 3 — Engine Intake 1 Air Temperature: Voltage Above Normal, Or Shorted To High Source
• International Fault Code SPN 172 FMI 2 — IAT Signal – Erratic, Intermittent, or Incorrect
• International Fault Code SPN 172 FMI 4 — IAP Signal – Out of Range LOW
• International Fault Code SPN 172 FMI 0 — Engine Intake 1 Air Temperature: Data Valid But Above Normal Operational Range – Most Severe Level
• International Fault Code SPN 172 FMI 2 — Engine Intake 1 Air Temperature: Data Erratic, Intermittent Or Incorrect
• International Fault Code SPN 172 FMI 4 — Engine Intake 1 Air Temperature: Voltage Below Normal, Or Shorted To Low Source