John Deere ECU000109.31 – ECU: Coolant Pressure Low

The system indicates low coolant pressure. This may be due to a faulty pressure cap or leaks in the cooling system.

1. 1

   Coolant pressure cap

2. 2

   Cooling system for leaks

1. 1

   Inspect

   Inspect the coolant pressure cap for damage or improper seating.

2. 2

   Test

   Test the coolant pressure cap for proper function using a pressure tester.

3. 3

   Inspect

   Visually inspect the cooling system for signs of leaks, including hoses, radiator, and connections.

4. 4

   Repair

   If a leak is found, repair or replace the affected component.

5. 5

   Replace

   If the pressure cap is faulty, replace it with a new one.