ECU 000174.04 – Low Input Voltage at Fuel Temperature Sensor. John Deere System Advisory.

ECU 000174.04 (ECU 174.04)

Code: 000174.04

Shortcode: 174.04


Error code ECU 000174.04 is triggered when the input voltage for the fuel temperature sensor falls below the specified minimum, indicating a possible short to ground. This fault can result in incorrect temperature readings, potentially affecting fuel system management and engine performance.


The engine’s fuel management system may not correctly adjust to actual fuel temperatures, leading to inefficiencies or potential engine damage.


  • Inspect Wiring and Connections: Check the fuel temperature sensor’s wiring for any signs of damage or grounding issues.
  • Test Sensor and Circuit Voltage: Use a multimeter to measure the voltage at the sensor to confirm it is within the specified range.
  • Repair or Replace Damaged Components: Fix or replace the sensor or wiring as necessary to restore proper voltage levels.
  • Reset ECU and Recalibrate Sensor: After repairs, reset the ECU to ensure it accurately processes the corrected sensor signals.


Maintaining accurate sensor inputs is crucial for the optimal performance of the engine’s fuel management system. Regular checks can prevent misdiagnosis and ensure the longevity of engine components.

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