Cummins

415

UnclassifiedCooling

What This Code Means

Coolant level sensor signal is showing a low coolant level for greater than 10 seconds; Engine failed to start after the expiration of crank time; Engine oil pressure is below the low oil pressure shutdown threshold; Engine has begun to overheat; Engine coolant temperature has risen to an unacceptable level; Engine is operating near cooling system capacity; Engine has overheated; Coolant temperature has risen above the shutdown trip point; Coolant level is low; Low Coolant Level warning message; Low Coolant Level shutdown message; Engine coolant level has fallen below the trip point; Fail To Start shutdown message; Engine cranks but fails to start; Engine oil pressure has dropped below the shutdown trip point

Possible Causes

  • •Low coolant
  • •Fuel system issues
  • •Manual fuel shutoff (FSO) valve is closed
  • •FSO valve solenoids or circuit are malfunctioning
  • •Incorrect starter disconnect speed
  • •Lubricating oil level is low
  • •Increase in load
  • •Higher ambient temperature
  • •Coolant leakage
  • •Low coolant level
  • •Obstructions to cooling airflow
  • •Loose or damaged fan belt
  • •Faulty blower fan or circulation pumps on remote radiator installations
  • •Fault with the control system
  • •Fault with the starting system
  • •Empty fuel tank
  • •Fuel leaks
  • •Blocked fuel lines
  • •Dirty fuel filter
  • •Dirty air filter

Suggested Actions

  1. 1Remove radiator cap and check that coolant is up to the required level
  2. 2Inspect fuel lines and fuel connections for leaks and repair if found
  3. 3Open the manual fuel shutoff (FSO) valve
  4. 4Check the FSO valve solenoids and circuit, and correct or replace as necessary
  5. 5Connect to the control via the InPower service tool and make sure Starter Disconnect Speed is set to 400 RPM
  6. 6Review fault code 151 correction list for other possible causes.
  7. 7Allow the engine to cool down completely before proceeding with checks.
  8. 8Look for possible coolant leakage points and repair if necessary.
  9. 9Check the coolant level and replenish if low.
  10. 10Check for obstructions to cooling airflow and correct as necessary.
  11. 11Check the fan belt and repair or tighten if necessary.
  12. 12Check the blower fan and circulation pumps on remote radiator installations.
  13. 13Allow the engine to cool down completely before proceeding
  14. 14Look for possible coolant leakage points and repair if necessary
  15. 15Check coolant level and replenish if low
  16. 16Reset the control and restart after locating and correcting the problem
  17. 17Allow the engine to cool down completely before proceeding with checks
  18. 18Check for an empty fuel tank, fuel leaks, or blocked fuel lines and correct as required
  19. 19Check for a dirty fuel filter and replace if necessary
  20. 20Check for a dirty or blocked air filter and replace if necessary

Related Cummins Fault Codes

4214413594423534883436112357811971131
Browse all Cummins fault codes

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for 415 on your specific Cummins unit — cited to the OEM manual, not a forum guess.

TRY IT FREE