Water ingress or heat damage can corrode the 2-pin connector on injector 4, causing intermittent contact.
When DF417 is active, you will likely experience: renault df417
In severe cases, the engine may stall and refuse to restart until the fault is cleared or the wiring is fixed. Water ingress or heat damage can corrode the
Renault’s industrial division also supplied the DF417 as a stationary engine or for use in small tractors and mobile cranes. In these roles, the engine ran at constant RPM for hours on end, driving hydraulic pumps or generators. Many French sawmills and grain silos were powered by DF417 engines long after the original vehicles were scrapped. In severe cases, the engine may stall and
| Repair | Difficulty | Estimated Cost (Parts + Labor) | |--------|------------|-------------------------------| | Repair chafed wires (solder + heat shrink) | DIY / Low | $50–$150 | | Replace injector (new or reman) | Moderate | $250–$500 | | Replace engine wiring harness | High | $600–$1,200 | | ECU repair / replacement | High | $400–$1,000 |
Pro tip: If you replace one injector, consider replacing all four or at least cleaning them. R9M injectors are sensitive to contamination, and a new injector can expose weaknesses in the others.
Renaults (especially those with 1.5 dCi, 1.9 dCi, or 2.0 dCi engines) have a few specific weak points that trigger this code.