Troubleshooting steps
Check engine components, verify oil pressure, check cooling system
Heavy Equipment Codes
Komatsu E66 – Engine fault
Engine fault
Details
Komatsu E66 error on Construction, Mining equipment indicates engine fault. Engine component failure, low oil pressure, overheating. Check engine components, verify oil pressure, check cooling system.
Error typeengine
MeaningEngine fault
Typical causesEngine component failure, low oil pressure, overheating
SolutionsCheck engine components, verify oil pressure, check cooling system
SeverityHigh
Catalog references
Where this appears
KomatsuE66
Utilities
Copy-paste helpers
Browse More
Explore Heavy Equipment Codes
View all 500 heavy equipment codes codes
FAQ
Common questions
What does E66 mean on Komatsu equipment?
E66 on Komatsu Construction, Mining equipment indicates engine fault. Engine component failure, low oil pressure, overheating.
Community
Discussion & Experiences
Share your experience, solutions, or ask questions about this error code. Help others troubleshoot!
Loading comments...