Cummins Generator Error Code 135: How to Fix It

Q: Can I run my Cummins generator with error code 135?

No. Running with low oil pressure can cause severe engine damage. Stop the generator immediately and diagnose the issue.

Q: How often should I change the oil in my Cummins generator?

Typically every 100-200 hours of operation or annually, whichever comes first. Check your owner's manual for specific intervals.

Q: What type of oil does a Cummins generator use?

Most Cummins generators require 15W-40 diesel engine oil that meets API CJ-4 or CK-4 specifications. Always verify with your model's manual.

Q: How do I reset the error code after fixing low oil pressure?

On most models, the error code clears automatically after the issue is resolved and the engine is restarted. Some may require using the control panel's reset button.

Q: What parts do I need to fix error code 135?

Common parts: engine oil (e.g., 15W-40), oil filter, oil pressure sensor, and possibly oil pump. Replace only after proper diagnosis.

Abstract

Cummins generator error code 135 indicates low engine oil pressure, which can cause serious engine damage if ignored. This guide walks you through the steps to diagnose and fix the issue safely.