CCU 000110.16 – Engine Coolant Temperature Signal Moderately High

CCU 000110.16 (CCU 110.16)

Code: 000110.16

Shortcode: 110.16


This fault code indicates that the engine coolant temperature is moderately high, suggesting that the engine is running hotter than normal but not yet at a critical level. This condition may lead to reduced engine efficiency and potential long-term damage if not addressed.


The engine’s functionality is adjusted to manage the higher coolant temperature and prevent overheating.


  • Check Coolant Level:
    • Ensure the coolant level is within the recommended range. Top up if necessary.
  • Inspect Cooling System Components:
    • Examine the radiator, coolant hoses, water pump, and cooling fan for any issues such as leaks, blockages, or malfunction. Repair or replace faulty components.
  • Inspect Coolant Temperature Sensor:
    • Verify that the coolant temperature sensor is functioning correctly and providing accurate readings.
  • Check Thermostat Operation:
    • Ensure the thermostat is not stuck and is opening and closing properly to regulate engine temperature.
  • Monitor Engine Operation:
    • After resolving any issues, reset the CCU and monitor the engine temperature to ensure it remains within the optimal range without trending towards overheating.


Maintaining an efficient cooling system is crucial for engine performance and longevity. Regular maintenance and prompt attention to moderately high temperature signals can prevent more severe overheating issues.

Control Units: John Deere

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