| Code Displayed | Meaning / Possible Issue | Source | | :--- | :--- | :--- | | RFC DTC: 1F FMI: 12 | Left parking lights short circuit (output in undercurrent). | This could be due to a short in the wiring harness connected to the left side parking lights, or a faulty bulb socket causing a short circuit. | | RFC DTC: 1B FMI: 05 | Rear right position light open circuit. | An open circuit means the electrical path is broken. This is often caused by a blown bulb (2x5W), a damaged bulb holder, or broken wiring. | | RFC DTC: 1A FMI: 05 | Number plate light open circuit. | As with the other open circuits, check the number plate light bulb (10W) and its wiring. The bulb may be faulty or the wiring may be corroded. | | RFC DTC: 1E FMI: 12 | Tail clearance light / external dimension lights: value too high. | This indicates a resistance issue, likely from an incorrect bulb wattage. Verify that the bulbs are the correct specification for the vehicle. | | RFC DTC: 09 FMI: 01 | Low axle front air pressure sensor / defective wiring. | This points to an issue with the air pressure system. The sensor may be faulty due to excessive pressure, or its wiring could be broken. | | RFC DTC: 11 | General communication or lighting system error (user report). | A forum user reported this code without specific details. A proper diagnosis with a scan tool is likely needed to pinpoint the exact cause. | | RFC DTC: 16, 18, 1D (All FMI: 05) | Multiple open circuit codes in the system. | Experienced by a user with an Stralis 430, reporting multiple RFC codes together. This often suggests a problem with the RFC module's internal outputs or a common power/ground point. | | RFC DTC: 1F FMI:12 | Retarder / heating issue. | A user reported this alongside a BC code when their Retarder stopped working after warming up. The code might be related to heat build-up affecting a component. | | RFC 23 FMI: 02 | CAN bus communication fault between FFC and RFC. | This suggests a network problem. The CAN bus line connecting the front and rear frame computers may have a wiring issue, such as a break, short, or poor connection. |
What are the showing on your screen?
: A faulty engine oil pressure sensor or air pressure sensor can trigger RFC errors. Connector Integrity
For persistent issues, a professional diagnosis using the IVECO EASY tool may be required to check for internal RFC hardware failures. IVECO Stralis RFC Fault Codes Guide | PDF - Scribd
: Use the steering wheel controls or the dashboard menu button to navigate to Diagnostics . iveco stralis rfc fault codes
Key causes include using incorrect bulb wattages, LED replacements causing resistance issues, corrosion in trailer connectors, or damage to the rear wiring harness. Troubleshooting and Repairing RFC Codes
Visually inspect the loom around the gearbox area and the fifth wheel pivot point.
of failure (e.g., short circuit to ground, open circuit, or signal out of range). OC (Occurrence Counter): Shows how many times the fault has happened. ACT (Active):
The Rear Frame Computer (RFC) is a critical electronic control unit in your Iveco Stralis. It manages everything located at the back of the truck, including taillights, trailer connections, air suspension, and rear axle sensors. When the RFC detects an electrical or communication glitch, it triggers a fault code on your dashboard. | Code Displayed | Meaning / Possible Issue
Additionally, advise drivers to avoid frequent engine shutdowns when the light is on. Interrupting regeneration is the number one cause of RFC 001.
Dealing with an error on an Iveco Stralis often means dealing with lighting, rear axle sensors, or chassis wiring issues. This module controls the electrical distribution for the back half of the truck. Understanding the RFC Module
Disconnect the plug of the faulty sensor. Use a digital multimeter to check for 5V or 12V reference voltage coming from the RFC module (depending on the sensor type). Check the resistance of the sensor itself to ensure it meets factory specifications.
Identifies the computer reporting the error (e.g., RFC, FFC, EDC). | An open circuit means the electrical path is broken
| | Description | Severity | Common Cause | |---------------------|-----------------|--------------|------------------| | RFC 001 | DPF Soot Load Too High (Above 140%) | High – Limp mode | Frequent short trips, faulty differential pressure sensor. | | RFC 019 | Exhaust Gas Temperature Sensor 1 (Before DPF) – Plausibility Error | Medium | Sensor failure, wiring harness chafing near the turbo. | | RFC 032 | Diesel Exhaust Fluid (AdBlue) Quality Fault | Medium | Contaminated DEF, wrong fluid, crystallization in tank. | | RFC 045 | EGR Valve Position – RFC Conflict (Stuck Open/Closed) | High | Carbon buildup, failed EGR actuator, low engine compression. | | RFC 078 | Fuel Dosing Unit – Open Circuit | High – No regeneration | Broken wire at the dosing injector connector, corroded pins. | | RFC 092 | DPF Differential Pressure – Plausibility (Signal out of range) | Medium | Hoses melted or clogged with soot, sensor offset. | | RFC 113 | Engine Torque Derate Active – Forced by RFC | Info only | Consequence of other RFC faults – triggers limp mode. | | RFC 141 | Ash Accumulation – Permanent DPF Limitation | High – Replace DPF | Engine oil consumption, poor fuel quality, high mileage (>500,000 km without cleaning). |
Signal value is above or below the acceptable operating limit. Left Direction Indicator Open or short circuit in the left-side turn signal. 1605 / 1606 Trailer Stop Light (Left) Open or short circuit in the left-side trailer brake light. 1705 / 1706 Rear Fog Light Open or short circuit in the rear fog light system. 2202 BCB CAN Line
The RFC system is highly sensitive to resistance. Even using the (e.g., using a 21W where a 10W is required) can trigger a persistent RFC error. Ensure all rear position, turn, and license plate bulbs are intact and match OEM specifications. 2. Inspect the Chassis Wiring
Don't let a cryptic fault code intimidate you. The Iveco Stralis was engineered with these detailed diagnostics to help you, not confuse you. For RFC codes, always start with the physical: check your lights, your wiring, and your connections.
Before diving into the specific codes, it is essential to understand how the Iveco Stralis displays faults on the onboard instrument cluster. Navigating the Dashboard Display