Diagnostics

Komatsu Fault Codes List by Machine Type

3,435 Komatsu fault codes and error codes, organized by machine type. Pick the machine to browse its codes.

Dump Truck1,115 codes
Engines1,067 codes
Excavator4 guides
Track Dozer1,253 codes
Wheel Loader3 guides

Looking for a different Komatsu code?Search the full fault-code database, or hand the code to the AI assistant for a plain-English explanation.

Safety-critical: confirm before use

Safety first: park on level ground, stop the engine, and secure the machine before any inspection. Thresholds, component locations, wire numbers, fuse locations, and reset procedures can vary by model, configuration, and serial number. Confirm them in the service documentation for your exact machine.