Description:

Error code ECU 001761.03 is triggered when the ECU detects that the voltage at the DEF tank fluid level sensor is too high, suggesting a short to a 12V power source. This abnormal voltage reading can lead to inaccurate DEF level readings, affecting emissions control.

Reaction:

Error code ECU 001761.03 is triggered when the ECU detects that the voltage at the DEF tank fluid level sensor is too high, suggesting a short to a 12V power source. This abnormal voltage reading can lead to inaccurate DEF level readings, affecting emissions control.

Recommendations:

• Inspect Sensor Wiring: Check the wiring to the DEF tank fluid level sensor for signs of damage or wear that could cause a short to a power source.
• Measure Sensor Voltage: Use a multimeter to verify the voltage at the sensor. High voltage readings confirm a short to 12V.
• Check for Wiring Short Circuits: Inspect the entire DEF level sensor circuit for shorts to the vehicle’s power system.
• Replace Damaged Wiring or Sensor: Repair or replace any damaged wiring or the sensor itself to correct the high voltage issue.
• Reset ECU and Perform Diagnostic Tests: After repairs, reset the ECU to clear the error code and perform diagnostic tests to ensure the sensor is functioning correctly and providing accurate readings.

Note:

Proper function of the DEF fluid level sensor is crucial for accurate DEF monitoring and effective emissions control. Regular checks and maintenance are essential to prevent electrical issues.