Description:

This diagnostic code is set when the SCR temperature module detects a problem with measuring the outlet temperature. Accurate outlet temperature measurement is vital for assessing the performance and efficiency of the SCR system.

Reaction:

The ECU may adjust or limit the operation of the SCR system to manage the detected fault, potentially impacting NOx reduction efficiency and overall vehicle performance.

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:

Accurate temperature readings at the SCR outlet are essential for monitoring and optimizing the NOx reduction process. Regular inspections and timely maintenance can help prevent temperature sensor-related issues.