7 Komatsu 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 |
|---|---|---|---|
| 168-4 | Electrical | Controller "Brown Out" | View fix |
| DX19KZ | Hydraulic | Travel Motor Shift Malfunction / Active E03 Alarm | View fix |
| Event 200 / F-02 | Electric Propulsion | Dynamic Retarding Dead / Overheat Alert | View fix |
| P0562 | Electrical | Controller Comm. Lost | View fix |
| SPN 3509 FMI 3 | Electrical | All Digging Telemetry Lost on Dash | View fix |
| SPN 3509 FMI 4 | Electrical | All Digging Telemetry Lost on Monitor | View fix |
| SPN 702 FMI 3 | Electrical / Controls | Attachment Hydraulics Dead | View fix |
Same codes keep coming back?
That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.
AM Fleet Integrity gives you QR-code operator reporting, preventive maintenance scheduling, and predictive alerts in one place. Start your 14-day free trial — no credit card required.
Start your free trial