Low voltage in "New" Renaults (Start/Stop models) can trigger false CAN-bus communication codes.
When the DF104 code is active, you might notice the following behavior in your Renault:
The "New" was never new. It was merely first . renault df104 new
Moisture entering the cabin can corrode the airbag or ABS modules, especially if seals around the windshield or doors are failing.
The symptoms you experience will depend entirely on the underlying component. Based on the various definitions above, a DF104 code can manifest as: Low voltage in "New" Renaults (Start/Stop models) can
The wiring harness between the HVAC controller and the fan motor should be tested for continuity. Look for frayed wires or poor grounding points. When to Buy a "New" Component
As mentioned on Drive2 and Club-Espace , the "green" power modules attached to the blower fan are common culprits. Check for burn marks or water damage. Replacement of these modules often solves the problem. 3. Check for Water Ingress Moisture entering the cabin can corrode the airbag
Sometimes a dirty or "rotted" ABS ring can trigger related sensor errors. Community members on Drive2 suggest checking the rear sensor rings for corrosion.