Based on the alphanumeric code , this most likely refers to a Renault fault code related to the Intake Air Temperature Sensor .

The DF455’s production run lasted until 1963, but its influence extended far beyond. It laid the groundwork for the larger, more powerful Super series (the D35, D22) and eventually the modern Renault (now Claas) tractors. Tens of thousands of DF455s were exported to Africa, the Middle East, and South America, where they served as the engines of development in other nations. Today, a well-restored DF455 commands respect at vintage rallies, not as a toy, but as a working monument.

Measure the resistance of the fuel sender unit with a multimeter to see if it matches manufacturer specifications for the current fuel level. Clear and Re-test:

: Verify the continuity of the signal wires between the tank and the passenger compartment. TurboRenault.co.uk or specific sensor resistance values

The fault can be caused by more than just a lack of petrol or diesel: Definition of check engine code DF455 Renault: Injection - Low fuel level signal.

Contrary to modern common-rail engines that rely on complex electronics, the DF455 is a mechanical engine. It uses a Bosch inline injection pump and pre-combustion chambers. This design choice means that the DF455 lacks electronic sensors, ECUs, and high-pressure fuel pumps. For mechanics and owners, this translates to one very attractive feature: .