Negative deviation (RFC_12–15) means the injector is delivering less fuel than commanded. Positive deviation (rare) means over-fueling.
: Likely the rear control unit (Bosch box located behind the diesel tank) has failed or has a bad connection. How to Read Codes Without a Scanner
Iveco Stralis RFC Fault Codes: Free Comprehensive Guide (2026 Updated)
System voltage outside operating range – Check for low battery voltage or poor ground connections to the rear frame.
usually indicate lighting (021xx) or suspension/sensor issues (023xx).
Stralis RFC fault - Iveco Daily Forums. Iveco Daily Forums. Iveco daily repair and maintenance. Stralis RFC fault. Share. 5 posts. Iveco Daily Forums
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
Unplug the main rear tail light connectors and look for green/white corrosion.
Controls tail lights, brake lights, indicators, and reversing lights.
Tail lights, brake lights, turn signals, reverse lights, and fog lamps.
When the RFC logic detects a discrepancy between desired and actual fuel pressure, it triggers a fault code. Misunderstandings about RFC often lead to unnecessary replacement of injectors or pumps—when the fix is often a simple calibration or a clogged filter.
