6 Detroit Diesel diagnostic codes on file — with the full diagnosis, repair steps, and field insights open to read free, no signup required.
Disclaimer: General reference information for trained, qualified technicians only. Codes and procedures vary by model, serial number and software version. Always follow the manufacturer's service manual and your site's safety procedures. Use at your own risk. Not affiliated with or endorsed by any manufacturer.
| Code | System | Symptom | Full fix |
|---|---|---|---|
| SPN 1077 FMI 14 | Fuel System | No-Start / Sudden Engine Stall | View fix |
| SPN 1215 (FMI 1) | Fuel System | Engine Stalling / No Start. | View fix |
| SPN 1215 (FMI 10) | Fuel System | Engine Surge / Limp Mode. | View fix |
| SPN 157 FMI 18 | Fuel System | Engine Power Cut / Stumble Under Load | View fix |
| SPN 3480 FMI 2 | Fuel System / Regen | Parked Regen Fails / Low Doser Press | View fix |
| SPN 520268 FMI 18 | Fuel System | Engine Derate / Extended Crank | View fix |
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