Renault: Df109

The DF‑109 is the heart of the fuel system. If it fails, you’ll see hard starts, loss of power, rough idling, or a “no‑start” condition. Because it’s a sealed unit, most repairs are “replace‑the‑pump” rather than “re‑build‑in‑the‑shop”, but the guide covers both approaches.

29-Oct-2013 — Check vacuum hoses I had the same car and found split hose causing rough running. Worth a try. Honest John renault df109

Renault's diagnostic system is highly sensitive. If you have multiple codes, always address the first by ensuring you have at least a 1/4 tank of fresh fuel. Often, this code is "stored" rather than "active," meaning it happened once during a low-fuel event and stayed in the memory. If you want to dive deeper, let me know: The DF‑109 is the heart of the fuel system

Air entering the intake manifold post-sensor can cause a lean mixture, triggering misfire codes. 29-Oct-2013 — Check vacuum hoses I had the

In original Renault documentation, refers to the 7-speed seamless shift hydraulic gearbox + differential assembly.