John Deere 001180.16 – ECU: Exhaust Temperature High

The Engine Control Unit (ECU) has detected moderately to severely high exhaust temperature, triggering an immediate engine power derate to protect components. This fault is often based on a calculated temperature value derived from multiple sensor inputs (such as intake air, coolant, EGR, and turbo speed) rather than a single direct exhaust temperature reading. It typically indicates an underlying condition causing high temperatures, such as an incorrect air-fuel mixture, restricted airflow, or cooling system debris.

• 9230
• 9330
• 9430
• 9530
• 9630
• 4830 Sprayer

1. 1

   Immediately decrease the load on the engine and reduce its speed

2. 2

   Inspect the cooling system, including the radiator, for any buildup of debris that could restrict airflow and lead to overheating

3. 3

   Verify that the engine coolant is at the proper level

4. 4

   Cycle power by turning the machine off and restarting it to see if the code clears temporarily

1. 1

   Connect diagnostic tool

   Connect the John Deere Service ADVISOR™ diagnostic tool to the machine to monitor temperature sensor readings in real-time.

2. 2

   Compare sensor readings

   With the engine cool and having not run for several hours, compare the temperature readings from all relevant sensors (EGR, intake, exhaust manifold, etc.). They should all read within a few degrees of each other.

3. 3

   Identify faulty sensor

   Identify the specific sensor that is providing a reading significantly different from the others. This is the most likely cause of the fault.

4. 4

   Replace sensor

   Replace the identified faulty temperature sensor with the correct OEM replacement part.

5. 5

   Clear code and test

   Clear the fault code and operate the machine to ensure the issue is resolved. If all sensors appear to be functioning correctly, further professional diagnosis is required to check for wiring issues, ECU faults, or a boost leak in the turbo plumbing.