Do not rely on a generic OBDII scanner. Use a Renault-specific diagnostic tool (like Renault Can Clip , PyClip , or a high-end professional scanner).
Check for chafed wires, corrosion, or loose connections near the relevant component (e.g., under the car for the O2 sensor or near the cylinder head for glow plugs). Test the Component: Lambda Sensor: renault fault code df083
Consult your manual for the "Engine Management" or "Oxygen Sensor" fuse. Replace any blown fuses and retest. 3. Resistance Test Use a multimeter to check the sensor’s heater circuit. Do not rely on a generic OBDII scanner