Use a diagnostic tool to view the live fuel level percentage. If the value is static or jumps erratically, the sensor is likely at fault. Inspect Connections:

This code indicates that the Engine Control Module (ECM) has detected a malfunction in the circuit.

: In rarer cases, the internal electronics that process the fuel signal may be malfunctioning. TurboRenault.co.uk Recommended Troubleshooting Steps Check Live Data : Use a diagnostic tool like Renault CAN Clip

If you are restoring an Estafette, a Goélette, or a vintage pump, treat the DF455 with respect. Source the correct pushrods. Set the valve lash to 0.20mm cold. Do not rev it past 4,500 rpm. And accept that you will smell like unburnt fuel and hot iron after a long drive.

: Use a diagnostic tool (like Renault CAN CLIP) to monitor the fuel level percentage or voltage while the vehicle is running and stationary. Inspect Connections