John Deere 3226.09 – Engine Control Unit (ECU): CAN Bus Message Cannot Be Received, Information from Aftertreatment Outlet NOx Sensor

This indicates a data transfer problem or an abnormal update rate between the control module and the Aftertreatment Outlet NOx Sensor.

• 5085E
• 5090E
• 5090EL
• 5100E
• 5090M
• 5100M
• 5100MH
• 5100ML
• 5115M
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6105M
• 9470RT
• 9520RT
• 9570RT
• 544K Wheel Loader
• 700L Dozer

1. 1

   Examine the Aftertreatment Outlet NOx sensor for physical damage, severe wear, or heavy soot accumulation that might interfere with its function.

2. 2

   Inspect the wiring harness and connectors between the Outlet NOx sensor and the ECU for corroded pins, loose connections, melted wires, or shorts to ground.

3. 3

   Verify that the sensor is receiving the correct supply voltage (12V or 24V depending on the machine) and has a solid ground.

4. 4

   Use a multimeter or oscilloscope to verify the integrity of the CAN High and CAN Low communication lines to the sensor.

1. 1

   Repair Wiring

   If any wiring faults or connector issues were found during the diagnostic phase, repair them first.

2. 2

   Replace the Sensor

   If the wiring and power supply are intact but the ECU still cannot communicate with the sensor, the sensor's internal module has likely failed. Remove and replace the Aftertreatment Outlet NOx Sensor.

3. 3

   Clear Locked Codes

   Connect a diagnostic tool (such as John Deere Service Advisor) to clear the locked aftertreatment codes from the ECU.

4. 4

   Perform Relearn/Reset

   Use the diagnostic tool to perform a system reset/relearn procedure so the ECU recognizes the new sensor, then run the machine to verify that emissions levels are reading correctly and the code does not return.