Gently rock the vehicle. If the values fluctuate rapidly or drop to zero arbitrarily, suspect a faulty tank rheostat or wiring terminal. Step 2: Inspection of the Fuel Pump Connector
In some databases, DF455 is listed as a 1.9 dCi 130 (actually 1,870 cc) or a 2.0 dCi 130 (1,995 cc). Verify by VIN or engine stamp.
: Clear the fault code and see if it returns immediately upon ignition or only after the engine starts. Summary of Associated Codes
: If the ECU believes there is no fuel, it may prevent the engine from starting or cause it to stall. renault df455
❌
: The dashboard may display a "SERVICE" or "STOP" warning, especially if the injection system enters a protective state.
: In some cases, the vehicle may enter a "safe mode," limiting engine performance and turbo usage to protect the system. Potential Causes Fuel Level Sensor (Sender Unit) Gently rock the vehicle
: Since Renaults use a CAN-bus system, a communication error between the Instrument Panel and the ECU can cause the injection system to lose track of the fuel level, triggering DF455 alongside codes like DF060 or DF152 .
: Some users report this error appearing on modified or "remapped" engines where the ECU software does not correctly interpret sensor data. Related Issues
The most common hardware cause is a failing fuel level sensor located inside the fuel tank. Over time, the resistive tracks on the float mechanism can wear out, corrode, or get coated in debris, leaving the sensor unable to transmit a continuous voltage signal to the dashboard or ECU. 2. Wiring and Connector Issues Verify by VIN or engine stamp
: Inspect the fuel pump connector for signs of corrosion or moisture, which is a common point of failure in Renault models like the Megane and Clio.
This comprehensive technical guide outlines the root causes, diagnostic steps, and repair solutions for resolving the DF455 error code. What Exactly Is the Renault DF455 Code?
Do not confuse the DF455 with the later S9U engine (often called the 2.5L "dTi" or turbo-diesel). The DF455 is mechanically distinct, with a different cylinder head and injection system.