19 Caterpillar 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 |
|---|---|---|---|
| 2265-7 | Hydraulic | Machine Sluggish / Lugging | View fix |
| 2265-7 | Hydraulic | Pump #1 Outlet Pressure Sensor: Not Responding | View fix |
| 2265-7 | Hydraulic | Slow Hydraulic Cycle Times | View fix |
| 2266-7 | Hydraulic | Erratic Main Pump Response | View fix |
| 2266-7 | Hydraulic | Pump #2 Outlet Pressure Sensor: Not Responding | View fix |
| 600-4 | Hydraulic | Hydraulic Temp Gauge High | View fix |
| 735-6 | Hydraulic | Heavy Lift Solenoid: Current Above Normal | View fix |
| 735-6 | Hydraulic | Heavy Lift Locked / Noisy MCV | View fix |
| E1239 | Hydraulic | Heavy Lift Weak / No Response | View fix |
| E1239 | Hydraulic | Heavy Lift Solenoid: Current Above Normal | View fix |
| MID 027 CID 0368 FMI 02 | Transmission | Harsh Shifts / Transmission Slip | View fix |
| MID 036 CID 0168 FMI 01 | Electrical | Multiple Sensor Faults / Monitor Blinks | View fix |
| MID 036 CID 0544 FMI 08 | Cooling | Engine Coolant Temp Creep / High Roar | View fix |
| MID 082 CID 0568 FMI 07 | Braking | Brake Warning / High Pedal Effort | View fix |
| MID 087 CID 0373 FMI 05 | Braking / Traction | Service Brakes Locked / Alarm Active | View fix |
| MID 087 CID 0420 FMI 05 | Electrical / Steering | Secondary Steering Active / Alarm | View fix |
| SPN 1087 FMI 1 | Braking / Air | Brake Pressure Warning / Truck Derate | View fix |
| SPN 177 FMI 16 | Transmission | Transmission Temperature Alarm / Derate | View fix |
| SPN 520215 FMI 03 | Hydraulics / Blade | Blade Lift Joystick Drift / No Response | 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