International (Navistar)
J1939 SPN/FMI
SPN 4765 / FMI 20
International Fault Code SPN 4765 FMI 20: Aftertreatment 1 Diesel Oxidation Catalyst Intake Temperature: Data Drifted High
SPN 4765 FMI 20 on International / Navistar trucks means: Aftertreatment 1 Diesel Oxidation Catalyst Intake Temperature: Data Drifted High.
Code details
- Manufacturer
- International (Navistar)
- Applies to
- International A26 (2024–2025)
- Fault code
- SPN 4765 FMI 20
- J1939 SPN
- 4765
- FMI
- 20
- 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 20 tells the shop the type of failure to test for: .
- Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.
Get this code diagnosed
Send one request and nearby diesel shops and mobile mechanics can quote the repair.
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Related fault codes
- International Fault Code SPN 4765 FMI 20 — DOCIT Signal – Drifted HIGH
- International Fault Code SPN 4765 FMI 2 — DOCIT Signal – Erratic, Intermittent, or Incorrect
- International Fault Code SPN 4765 FMI 21 — DOCIT Signal – Drifted LOW
- International Fault Code SPN 4765 FMI 3 — DOCIT Signal – Out of Range HIGH
- International Fault Code SPN 4765 FMI 4 — DOCIT Signal – Out of Range LOW
- International Fault Code SPN 4765 FMI 7 — DOCIT – Not Increasing with Engine Temperature
- International Fault Code SPN 4765 FMI 10 — Aftertreatment 1 Diesel Oxidation Catalyst Intake Temperature : Abnormal Rate Of Change
- International Fault Code SPN 4765 FMI 12 — Aftertreatment 1 Diesel Oxidation Catalyst Intake Temperature: Bad Intelligent Device Or Component
Source: International A26 2024–2025 fault code list (Diesel Laptops). See also OBD-II codes.