Iveco 01F3 – Engine ECU: Soot filter clogged sensor circuit fault

A malfunction in the electrical circuit of the DPF (Diesel Particulate Filter) differential pressure sensor, which prevents the engine control unit from monitoring filter health and initiating active DPF regeneration cycles.

• Iveco Daily
• Iveco EuroCargo
• Iveco Stralis
• Iveco Trakker

1. 1

   Inspect the electrical circuit of the DPF pressure sensor for open circuits, short circuits to ground, or damaged connectors.

2. 2

   Check the silicon hoses/tubes connecting the sensor to the DPF for melting, cracking, leaks, or blockages caused by soot/debris.

3. 3

   Inspect the exhaust system for leaks before or near the DPF pressure sensor, which can skew pressure readings.

4. 4

   Use a manual manometer to bypass the OBD system and obtain physical pressure readings to confirm if the sensor is reading incorrectly or if the DPF is genuinely blocked.

5. 5

   Ensure the DPF itself is not suffering from excessive ash accumulation, which can cause secondary pressure faults.

1. 1

   Locate the Sensor

   Find the DPF differential pressure sensor, which is typically mounted in the engine compartment (away from extreme exhaust heat) and connected to the DPF via rubber/silicon hoses.

2. 2

   Repair Wiring/Hoses

   If the diagnostic checks revealed melted hoses (a common issue near the DPF box) or damaged wiring, replace the affected hoses or repair the harness.

3. 3

   Replace the Sensor

   If the wiring and hoses are intact, the sensor itself has likely failed internally. Disconnect the electrical connector, remove the hose clamps, and swap in a new OEM differential pressure sensor.

4. 4

   Clear Fault Codes

   Use a diagnostic scanner (such as Iveco EASY) to clear the 01F3 fault code from the Engine ECU.

5. 5

   Perform Regeneration

   Initiate a forced DPF regeneration via the diagnostic tool, or take the vehicle for a highway test drive to allow the system to perform an active regeneration and verify the repair.