Massey Ferguson E174 – Engine ECU: Fuel Temperature Sensor Issue

Fault code E174 indicates an issue with the Fuel Temperature Sensor. Depending on the specific FMI, it can mean fuel inlet temperature high (>85°C), no signal, voltage above normal/open circuit, voltage below normal, or temperature above normal.

• Massey Ferguson 8600 Series
• Massey Ferguson 5600 Series
• Massey Ferguson 7600 Series

1. 1

   Confirm the symptom: check for hot-start faults such as slow cranking when hot, clicking but not cranking, or cranking well but refusing to fire.

2. 2

   Inspect the wiring harness and connector at the fuel temperature sensor for corrosion, breaks, or poor grounding.

3. 3

   Check fuel system health: ensure fuel filters are not clogged, check for hose leaks, and verify that the injectors are clean.

4. 4

   Connect a diagnostic tool to the vehicle to read live data from the fuel temperature sensor and carry out an injector test.

1. 1

   Confirm fault code

   Connect the diagnostic tool to the vehicle to confirm the active E174 fault code.

2. 2

   Locate sensor

   Locate the fuel temperature sensor on the engine block/fuel inlet.

3. 3

   Inspect connector

   Disconnect the electrical connector and inspect the pins.

4. 4

   Replace sensor

   If the wiring is intact but the sensor is failing (no signal or out-of-range voltage), replace the fuel temperature sensor.

5. 5

   Restore conditions

   Restore the conditions of the vehicle (reconnect the sensor and clear the fault codes).

6. 6

   Test engine

   Run the engine until it reaches operating temperature.

7. 7

   Verify repair

   Indicate on the diagnostic tool if the problem persists. If the code returns, further diagnosis of the Engine ECU or fuel injection pump may be required.