ECU 004765.12 – DOC Inlet Temperature Fault. John Deere System Advisory.
ECU 004765.12 (ECU 4765.12)
Code: 004765.12
Shortcode: 4765.12
Description:
This code is triggered when the exhaust filter temperature module detects a problem with measuring the DOC inlet temperature. Accurate measurement of DOC inlet temperature is essential for proper functioning 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 inlet 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 inlet 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:
Accurate DOC inlet temperature readings are crucial for the efficiency and effectiveness of the exhaust aftertreatment system. Regular maintenance and timely inspections can help prevent temperature sensor-related issues.