3 Eaton Cummins Endurant diagnostic codes on file. Each shows the symptom for free — unlock the full diagnosis, repair steps, and field insights with a free account.
| Code | System | Symptom | Fix |
|---|---|---|---|
| SPN 3456 FMI 05 | PTO / Engagement | PTO Won't Engage / Service Lamp | Unlock |
| SPN 522120 FMI 07 | Clutch Actuator | Cannot Shift from Neutral / Clutch Alarm | Unlock |
| SPN 522125 FMI 02 | Shift Rail | Transmission Jumps Out of Gear / Neutral | Unlock |
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