If you read , the CAN-High and CAN-Low wires are shorted together. If you want to isolate a specific error, let me know: The exact numeric code shown on your dashboard display

Tilt the cab to inspect the main wiring loom routing from the cab to the chassis.

Before diving into fault codes, it is essential to understand what the RFC system does. . It is a subsystem within the after-treatment setup (specifically the SCR – Selective Catalytic Reduction and DPF system).

Inconsistent or implausible signal (data corruption). Master List of Common Iveco Stralis RFC Fault Codes Affected Component / System Typical Root Cause RFC 01 Left rear tail light circuit Blown bulb, corroded socket, or severed wiring loom. RFC 02 Right rear tail light circuit Short circuit in the light cluster housing. RFC 03 Left brake light circuit Faulty brake light switch or corroded trailer plug. RFC 04 Right brake light circuit Open circuit in the rear frame wiring harness. RFC 09 Left rear turn signal Incorrect bulb wattage or broken wire. RFC 10 Right rear turn signal Bad ground connection at the rear crossmember. RFC 31 ECAS Rear axle pressure sensor Sensor failure or supply voltage out of range. RFC 32 ECAS Tag/axle pressure sensor Corroded sensor connector pins. RFC 41 Rear axle height sensor Mechanical linkage broken or sensor internal fault. RFC 52 Trailer ABS power supply circuit Faulty relay or short circuit in the trailer suco socket. RFC 70 RFC Module internal memory error Internal hardware failure or severe voltage drop. RFC 94 CAN-bus communication line (BC to RFC) Twisted pair data lines damaged, green/white wires chaffed. Step-by-Step Diagnostics for RFC Faults

If your dashboard displays an RFC fault, follow this systematic guide to isolate and fix the problem.

For more information on Iveco Stralis RFC fault codes, you can try the following free resources:

Match it to our free table above. For example, means soot load is excessive—the RFC system tried to regen but failed.

The RFC system is part of the transmission control unit (TCU). Unlike a fully automatic transmission, the Stralis (particularly models with Eurotronic) uses a robotic clutch and pneumatic actuators to shift gears.

When encountering an RFC fault code on your Iveco Stralis, follow these steps:

: RFC faults are frequently caused by using incorrect bulb wattages (e.g., using a 21W bulb instead of 10W) or low-quality bulbs that the computer misinterprets as a short.

Insert the key and turn it to the "ON" position (do not start the engine).

You do not always need a computer to retrieve these codes. The Stralis features a built-in display that can show you the faults directly on the dashboard.

Fault codes are often displayed as a combination of a (Diagnostic Trouble Code) and an FMI (Failure Mode Identifier). Meaning / Likely Cause 09 01

Here is a comprehensive index of common RFC-related fault codes found on the Iveco Stralis, along with their diagnostic meanings. Lighting and Signal Failures

The location differs by cab type. On a rigid truck, the RFC is typically behind the rear axle. On a tractor unit, it is often in the center of the chassis. It can also be found on the inside of the chassis at the O/S (offside) under the catwalk.

The in an Iveco Stralis manages critical rear-vehicle functions like lighting, air suspension, and axle pressure sensors. When an RFC fault occurs, the dashboard typically displays a specific code format, such as DTC 09 / FMI 01 . Common RFC and Related Fault Codes