Description:

This diagnostic code indicates that the SCR temperature module has detected a problem with measuring the outlet temperature. Accurate measurement of the SCR outlet temperature is crucial for assessing the efficiency and performance of the SCR system, which reduces nitrogen oxide (NOx) emissions.

Reaction:

The ECU may adjust or limit the operation of the SCR system to prevent potential damage, which can impact the effectiveness of NOx reduction and overall emissions compliance.

Recommendations:

• Inspect Temperature Sensor: Check the SCR outlet temperature sensor for proper operation. Replace the sensor if it is faulty.
• Inspect Wiring and Connections: Look for damaged, frayed, or loose wiring and connectors associated with the SCR outlet temperature sensor. Repair or replace as necessary.
• Check for Contaminants: Ensure that the sensor and its surroundings are free from contaminants that could affect the temperature readings.
• Test Sensor Circuit: Use diagnostic tools to test the sensor circuit for continuity and correct voltage levels.
• Reset ECU and Monitor System: After addressing the issue, reset the ECU to clear the fault code and monitor the system to ensure accurate temperature measurement.

Note:

Maintaining accurate temperature readings at the SCR outlet is essential for optimizing the NOx reduction process and ensuring emissions compliance. Regular inspections and timely maintenance can help prevent temperature sensor-related issues.