: Rear-frame components are exposed to road salt and moisture. Corroded pins in the RFC block or light housings are frequent culprits. For a complete official list, you can reference the IVECO Stralis RFC Fault Codes Guide TruckSpares365 Hub which hosts downloadable PDFs of these codes. currently showing on your dashboard? Stralis RFC fault - Iveco Daily Forums
You can purchase a ($10–$20) and connect it to free apps like: iveco stralis rfc fault codes free
While professional tools like Iveco Diagnostic Kit or Jaltest are ideal, you can read basic fault codes for free on many Stralis models (especially the Euro 5 and Euro 6 variants) using: : Rear-frame components are exposed to road salt
You do not need a $5,000 dealer tool to read RFC codes. Here are legitimate free or low-cost methods: currently showing on your dashboard