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Code C1106

Quick reference

C1106 at a glance

Plain-language meaning
This code means that there's a problem with the car's communication system, like when your phone can't connect to Wi-Fi.
Urgency
Moderate – It is important to address this issue to prevent communication failures between vehicle systems.
Difficulty
Moderate
System
Communication Network Issue
Tools mentioned
OBD-II scanner, Multimeter, Wire repair kit

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means that there's a problem with the car's communication system, like when your phone can't connect to Wi-Fi.

Explanation

The FlexRay transceiver is part of the car's communication network that allows different parts of the car to talk to each other. This code indicates an electrical issue in that network.

Technical description

The C1106 code is triggered when there is an electrical fault in the FlexRay transceiver circuit. FlexRay is a high-speed communication protocol used in advanced automotive systems to ensure reliable data exchange between electronic control units (ECUs). An electrical issue could mean a short circuit, open circuit, or other wiring problems affecting the transceiver's ability to function correctly.

Symptoms

• Warning lights on the dashboard

• Loss of communication between vehicle systems

• Erratic vehicle behavior

Common Causes

• Faulty FlexRay transceiver

• Damaged wiring or connectors

• Short or open circuit in the FlexRay network

Glossary

FlexRay: A high-speed communication protocol used in automotive systems.

Transceiver: A device that transmits and receives communication signals.

Diagnosis steps

• Check for any other related trouble codes.

• Inspect the FlexRay wiring and connectors for damage.

• Test the FlexRay transceiver with a multimeter.

Repair procedures

• Replace faulty FlexRay transceiver.

• Repair or replace damaged wiring and connectors.

• Clear the code and test drive the vehicle to ensure the issue is resolved.

Tools required

• OBD-II scanner

• Multimeter

• Wire repair kit

Estimated repair cost

$200 - $500

Difficulty level

Moderate

Commonly affected vehicles

• BMW 5 Series

• Audi A6

• Mercedes-Benz E-Class

Preventive measures

• Regularly inspect vehicle wiring for damage.

• Ensure connectors are securely attached.

• Avoid exposure to moisture and extreme temperatures.

Error code type

Communication Network Issue

User experience recommendations

• Have the vehicle inspected by a professional technician.

• Avoid driving the vehicle until the issue is resolved to prevent further damage.

Warranty information

Check with the vehicle manufacturer for warranty coverage on communication system components.

Historical data

The C1106 code has become more prevalent with the increased use of FlexRay networks in modern vehicles for advanced communication needs.

Urgency level

Moderate – It is important to address this issue to prevent communication failures between vehicle systems.

Testing conditions

• Vehicle in ignition ON position.

• Ensure all systems are powered.

Component location

The FlexRay transceiver is typically located within the vehicle's ECU or near the communication network hub.

FAQs

Q: Can I drive my car with a C1106 code?
A: It's not recommended to drive with this code active, as it may cause unpredictable vehicle behavior.

Q: How do I know if my FlexRay transceiver is faulty?
A: A professional technician can diagnose this by testing the transceiver and inspecting the wiring.

Optional diagnostic gear

Tools that may help diagnose C1106

FOXWELL Multi-System Scanner diagnostic tool illustration

Pro · Four-system diagnostics

FOXWELL Multi-System Scanner

A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.

Chassis and ABS faults usually need a scanner that can read brake-system data directly.

View on Amazon
EPAuto 1/2" Torque Wrench diagnostic tool illustration

Universal · Torque wrench

EPAuto 1/2" Torque Wrench

Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.

Useful when wheel, hub, or suspension hardware needs correct reassembly torque.

View on Amazon
MaxxHaul Vehicle Ramps diagnostic tool illustration

Universal · Drive-on ramps

MaxxHaul Vehicle Ramps

Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.

Helpful for safer access during underbody inspection work.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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