Renault Dacia Samsung Renault Error Df004 | Trusted FULL REVIEW |

Vehicles equipped with dCi (diesel Common rail injection) engines, particularly the 1.5 dCi (K9K) and 2.0 dCi (M9R) engines. 2. Technical Description DF004 is defined by Renault as: “Fuel pressure regulator circuit – Coherence” or “Fuel pressure regulator control – Open circuit or short circuit to earth/battery.” In simpler terms: The engine control unit (ECU) has detected an electrical or logical malfunction in the control circuit of the fuel pressure regulator, which is mounted on the high-pressure fuel pump (HPFP).

If desired and actual pressure differ greatly but PCV command is not saturated → suspect or low-pressure fuel system . renault dacia samsung renault error df004

1. Overview Error Code: DF004 Manufacturer Group: Renault Group (including Renault, Dacia, and Renault Samsung Motors) System Affected: Engine Management / Diesel Injection System Component: Fuel High Pressure Circuit – specifically, the Fuel Pressure Regulator (PCV – Pressure Control Valve) or its electrical circuit. Vehicles equipped with dCi (diesel Common rail injection)