Cummins

144

UnclassifiedCooling

What This Code Means

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

Possible Causes

  • •Coolant leakage
  • •Faulty blower fan or circulation pumps on remote radiator installations
  • •Higher ambient temperature
  • •Increase in load
  • •Loose or damaged fan belt
  • •Low coolant level
  • •Obstructions to cooling airflow

Suggested Actions

  1. 1Allow the engine to cool down completely before proceeding with checks.
  2. 2Check for obstructions to cooling airflow and correct as necessary.
  3. 3Check the blower fan and circulation pumps on remote radiator installations.
  4. 4Check the coolant level and replenish if low.
  5. 5Check the fan belt and repair or tighten if necessary.
  6. 6Look for possible coolant leakage points and repair if necessary.
  7. 7Review fault code 151 correction list for other possible causes.

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