Description:

This diagnostic trouble code is set when the exhaust filter temperature module detects a problem with measuring the DOC outlet temperature. Accurate DOC outlet temperature measurement is important for assessing the performance and efficiency of the exhaust aftertreatment system.

Reaction:

The ECU may limit or adjust engine performance to manage the detected fault and ensure safe operation of the exhaust system.

Recommendations:

• Inspect Temperature Sensor: Check the DOC 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 DOC 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 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 DOC outlet temperature readings is essential for optimizing the performance and ensuring the compliance of the exhaust aftertreatment system. Regular inspections and timely maintenance can help prevent temperature sensor-related faults.