Diagnostics

Caterpillar Fault Codes List by Machine Type

9,595 Caterpillar fault codes and error codes, organized by machine type. Pick the machine to browse its codes.

CAT8,255 codes
CAT Engine1,340 codes
Backhoe2 guides

Looking for a different Caterpillar 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.