Iveco 01F6 – Engine Control Unit (ECU) / EDC: Exhaust temperature sensor fault to converter

Malfunction, implausible signal, or circuit failure of the Exhaust Gas Temperature (EGT) sensor located upstream of the catalytic converter or Diesel Particulate Filter (DPF).

• Iveco Daily
• Iveco Stralis
• Iveco Eurocargo
• Iveco Trakker
• Iveco Massif
• Irisbus
• Iveco Bus

1. 1

   Connect a diagnostic tool to the EDC and view the live exhaust gas temperature data. If the temperature reads an implausible fixed value (e.g., pegged at a maximum limit or showing 630°C on a cold engine), the sensor or its wiring is shorted/open.

2. 2

   Inspect the sensor wiring harness and the 2-pin connector. Look for melted wires, heat damage, or loose connections caused by vibration.

3. 3

   On vehicles with multiple EGT sensors (e.g., upstream and downstream of the DPF), verify that the connectors have not been accidentally reversed during previous maintenance (connectors are often color-coded).

4. 4

   Disconnect the sensor and test the resistance across the pins with a multimeter. An open circuit (infinite resistance) or a dead short indicates a failed internal sensing element.

1. 1

   Prepare vehicle

   Ensure the vehicle is turned off and the exhaust system has completely cooled to prevent severe burns.

2. 2

   Locate the sensor

   Locate the faulty EGT sensor on the exhaust pipe, specifically the one positioned upstream of the catalytic converter or DPF.

3. 3

   Disconnect wiring

   Unplug the 2-pin electrical connector linking the sensor to the engine wiring harness.

4. 4

   Remove the sensor

   Using a 17mm spanner/wrench, carefully unscrew the sensor from the exhaust bung. Note: Exhaust sensors are prone to seizing. You may need to apply penetrating oil and let it sit before attempting removal to avoid stripping the threads.

5. 5

   Install the new sensor

   Apply a small amount of high-temperature anti-seize compound to the threads of the new sensor (if it does not come pre-coated). Thread it in by hand to prevent cross-threading, then tighten it securely with the 17mm wrench.

6. 6

   Reconnect wiring

   Plug the 2-pin connector back into the wiring harness, ensuring it clicks into place. Route the wire safely away from direct contact with the hot exhaust pipe.

7. 7

   Clear codes and verify

   Turn the ignition on, connect your diagnostic tool to the OBD/Iveco port, and clear the 01F6 fault code from the EDC memory. Start the engine and verify that the live temperature data now reads ambient/normal exhaust temperatures.