Description:

This diagnostic trouble code indicates a data transfer problem between the Engine Control Unit (ECU) and the Selective Catalytic Reduction (SCR) temperature module. The ECU is unable to receive data from the SCR temperature module, which can impact the accurate monitoring and control of the SCR system.

Reaction:

The ECU may limit or adjust the operation of the SCR system to ensure safe operation and emissions compliance. This could result in reduced engine power and performance.

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 SCR 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 SCR 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 SCR temperature module are secure and free of corrosion.
• Verify SCR Temperature Module Function: Ensure that the SCR 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 SCR temperature module is crucial for accurate SCR system performance and emissions control. Regular inspections and timely maintenance can help prevent communication-related issues.