If your Renault logs a DF455 fault, you may notice one or more of the following symptoms:
The Renault DF455 engine has been widely used in various applications, including:
This can help determine if the problem is in the fuel tank unit or a wiring fault. Facebook·UK Renault Megane Sport (2004-2008) Owners Club
| Parameter | Value | |--------------------|--------------------------------| | Displacement | 1,995 cc | | Bore × stroke | 82.7 × 93.0 mm | | Compression ratio | 17.5:1 – 18.5:1 (variant) | | Max power | 105–130 hp (77–96 kW) @ 4,000 rpm | | Max torque | 240–300 Nm @ 2,000 rpm | | Injection pressure | 1,350–1,600 bar (rail pressure) | | Turbo | Variable geometry (Garrett / BorgWarner) | | Intercooler | Yes, air‑to‑air | | Oil capacity | ~5.1 liters (with filter) | | Oil spec | ACEA C3 / Renault RN0720 (5W‑30 or 5W‑40) | renault df455
: Messages like "Check Injection" or a steady amber wrench/service light appearing on the instrument panel.
| Interval | Action | |---------------------|----------------------------------------------------------------| | Every 10,000 km | Engine oil + filter (use spec – very important) | | Every 20,000 km | Air filter, cabin filter | | Every 40,000 km | Fuel filter (Delphi system: bleed properly after change) | | Every 60,000 km | Check/clean EGR valve; inspect turbo actuator | | Every 80,000 km | Coolant change (OAT type, e.g. Renault Glaceol D) | | Every 100,000 km | Timing belt + tensioners + water pump (critical – interference engine) | | Every 120,000 km | Accessory belt + tensioner | | As needed | DPF regeneration check (forced regen if short‑trip driving) |
The DF455 code points to a problem within the low-fuel level detection circuit. The primary causes typically fall into four categories: If your Renault logs a DF455 fault, you
Understanding the root cause is critical for an effective and lasting repair. Here are the most common triggers for the DF455 code:
: Use electrical cleaner on the fuel pump connector and check for bent or oxidized pins. Test the Sender Unit
The Renault DF455 code, while alarming due to the "Check Injection" warning, is usually a localized problem with the . By focusing on the fuel tank sensor unit and wiring, you can typically resolve the issue. If your gauge is erratic and the code is present, inspecting the sender unit in the tank is the best place to start. Renault Glaceol D) | | Every 100,000 km
Generic OBD-II scanners may not fully interpret Renault DF codes. For accurate diagnosis, use a Renault CLIP (the manufacturer’s own diagnostic interface) or an advanced CAN-bus scanner that supports Renault’s proprietary protocols. Many owners have successfully used an ELM 327 adapter together with appropriate software.
Navigate to the module and the Injection ECU module.
The cost to resolve the code depends on the underlying cause and whether you visit a dealership, independent mechanic, or perform the work yourself.
DF455 responds well to stage 1 (to ~160 hp / 360 Nm). Ensure clutch (if manual) can handle torque. Deleting DPF/EGR is possible but illegal for road use in many countries.
Renault's multiplex architecture is highly sensitive to overall system voltage. If your car's , modules like the UCH and Injection ECU drop communication frames during cranking. Furthermore, water leaks into the engine bay fuse box (often referred to as the UPC or protection unit) can corrode the terminal pins that feed the multiplex lines, mimicking a bad fuel sensor. Step-by-Step Diagnostic and Repair Guide