Dacia Samsung Renault Error Df004: Renault

| Test | Measurement | Good value | |------|-------------|-------------| | Resistance across regulator pins (solenoid) | Ω | 2.5 – 5.0 Ω (varies by engine, typically ~3Ω) | | Resistance from each pin to chassis ground | Ω | Infinite (OL) – if low, internal short | | Voltage on harness pins (ignition ON) | V | Pin 1: ~0V (ECU ground). Pin 2: ~0V but should have reference voltage? No – it's a PWM drive. Better test: continuity to ECU. | | Continuity from harness to ECU pin | Ω | < 1Ω per wire |

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. renault dacia samsung renault error df004

Repair broken wire near the HPFP connector (brown or yellow wire, depending on year). Most common fix on 2.0 dCi (M9R): Replace fuel pressure regulator (internal solenoid failure) and clean HPFP inlet screen. If you have a specific vehicle model and engine code, I can narrow down the exact pinout, resistance spec, and harness routing for that variant. | Test | Measurement | Good value |