Description:

This diagnostic trouble code indicates a data transfer problem between the Engine Control Unit (ECU) and the exhaust filter temperature module. The ECU is unable to receive CAN Bus messages from the exhaust filter temperature module, which can impact the accurate monitoring and control of exhaust temperatures.

Reaction:

The ECU may limit or adjust the operation of the exhaust filter system to manage the inability to receive temperature data, potentially resulting in reduced engine performance and increased emissions.

Recommendations:

• Inspect CAN Bus Wiring and Connections: Check for damaged, frayed, or loose wiring and connectors associated with the CAN Bus between the ECU and the exhaust filter temperature module. Repair or replace as necessary.
• Test CAN Bus Communication: Use diagnostic tools to test the CAN Bus communication between the ECU and the exhaust filter temperature module. Ensure that there are no interruptions or data transfer issues.
• Check for Loose Connections: Verify that all connections between the ECU and the exhaust filter temperature module are secure and free of corrosion.
• Verify Exhaust Filter Temperature Module Function: Ensure that the exhaust filter temperature module is functioning correctly and is able to send data.
• Reset ECU and Monitor System: After resolving the issue, reset the ECU to clear the fault code and monitor the system to ensure normal operation.

Note:

Maintaining proper communication between the ECU and the exhaust filter temperature module is crucial for accurate exhaust temperature monitoring and control. Regular inspections and timely maintenance can help prevent communication-related issues.