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.


Control Units: John Deere