Iveco 2.3 – EDC (Electronic Diesel Control): Fuel Temperature Sensor Fault

EDC Blink Code 2.3 indicates a fault with the fuel temperature sensor, typically caused by an open circuit, a short circuit to ground, or a short circuit in the positive connection line. When this fault is triggered, the sensor's signal is deemed implausible. As a safety measure, the system ignores the live sensor data and substitutes a fixed recovery parameter of 20°C to keep the engine running, which may result in a slight power reduction.

• Iveco Daily (including 2.3L F1A engines
• 35S12
• 35C12
• and 3rd/4th/5th generation models)
• Iveco Stralis (e.g.
• 420 Euro 6)
• Iveco Buses
• Iveco / FPT Industrial & Marine Engines (e.g.
• N60 ENT M37)

1. 1

   Visually inspect the fuel temperature sensor connector (often located on or near the fuel filter housing) for loose, unplugged, or improperly inserted connections.

2. 2

   Connect a diagnostic tool and view live parameters; if the sensor or wiring is faulty, the fuel temperature reading will remain completely unchanged at the default 20°C.

3. 3

   Perform a multimeter resistance test by disconnecting the sensor and measuring the resistance between terminals 1 and 2. At an ambient temperature of 20°C, an intact sensor should read approximately 2.5 kΩ.

4. 4

   Check the wiring harness between the sensor plug (Pin 1 and 2) and the EDC control unit for continuity, open circuits, or shorts to ground.

1. 1

   Locate sensor

   Turn off the ignition and locate the fuel temperature sensor on the fuel circuit or fuel filter housing.

2. 2

   Disconnect harness

   Disconnect the wiring harness from the fuel temperature sensor.

3. 3

   Repair wiring or replace sensor

   If the wiring harness is damaged or corroded, repair the affected wires. If the sensor failed the multimeter resistance test, unscrew and remove the faulty fuel temperature sensor.

4. 4

   Install new sensor

   Install the new fuel temperature sensor and securely reconnect the wiring harness.

5. 5

   Clear fault codes

   Clear the code using a diagnostic tool, or via the manual EDC blink code procedure: With the key turned off, press and hold the diagnosis button. Keeping the button pressed, turn the ignition key ON. Keep the button pressed for exactly 5 seconds. Let go of the button, then turn the key OFF.

6. 6

   Test drive

   Start the engine and verify that the EDC warning light remains off and that the vehicle has regained full power.