Description:

This error code indicates that the voltage at the DEF tank fluid temperature sensor is too low, suggesting a short to ground. This fault can cause the sensor to report inaccurately low temperatures, potentially disrupting DEF management.

Reaction:

Based on incorrect low temperature readings, the ECU might alter DEF dosing rates improperly, potentially affecting emissions control systems.

Recommendations:

• Check Sensor Wiring and Connections: Inspect the connections and wiring to the DEF tank temperature sensor for any signs of a short to ground.
• Test Voltage at the Sensor: Use a multimeter to verify that the voltage level at the sensor is within normal operating ranges.
• Resolve Wiring Issues: Repair any grounding issues found during the inspection and replace any damaged parts of the wiring harness or sensor.
• Reset ECU and Test System Accuracy: After repairing the electrical fault, reset the ECU and test the system to ensure the temperature sensor provides accurate readings.

Note:

Proper functioning of the DEF tank temperature sensor is crucial for effective DEF management and emissions control. Regular monitoring and maintenance of the sensor and its wiring can prevent performance issues.