Description:

This error indicates a communication issue between the ECU and the aftertreatment inlet NOx sensor. The ECU is unable to receive data, possibly due to a fault in the CAN Bus system, affecting the transmission of crucial emissions monitoring data.

Reaction:

The ECU may enter a default operating mode, potentially increasing emissions and reducing engine efficiency, until the communication issue is resolved.

Recommendations:

• Inspect CAN Bus Connections: Check all related wiring and connectors for damage or disconnections that could interrupt data transmission.
• Test NOx Sensor and CAN Bus Functionality: Use diagnostics to assess the integrity and functionality of the NOx sensor and the CAN Bus system.
• Resolve Communication Faults: Repair or replace any faulty components identified during testing.
• Reset ECU and Re-establish Communication: After repairs, reset the ECU to clear the fault and re-establish communication with the NOx sensor.
• Monitor System Performance: Ensure the system transmits and receives all sensor data correctly post-repair.

Note:

Ensuring robust communication via the CAN Bus is essential for accurate monitoring and control of vehicle emissions. Regular checks can prevent communication failures and support compliance with environmental regulations.