AutoCodes – Generic – U18C2

U18C2 Code - Lost Communication With Frontview Camera Module On Flexray Bus

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Frontview Camera Module, Frontview Camera Module harness is open or shorted, Frontview Camera Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U18C2 indicates Lost Communication With Frontview Camera Module On Flexray Bus.
Common causes: Common causes include Faulty Frontview Camera Module, Frontview Camera Module harness is open or shorted, Frontview Camera Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 661

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U18C2 Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. The Diagnostic Trouble Code (DTC) will set a supervised periodic message that includes the transmitter device availability that has not been received.

OBDII Code U18C2 - Lost Communication With Frontview Camera Module On Flexray Bus - AutoCodes.com — U18C2 Code - Lost Communication With Frontview Camera Module On Flexray Bus

What does this mean?

What are the Possible Causes of the DTC U18C2?

Faulty Frontview Camera Module
Frontview Camera Module harness is open or shorted
Frontview Camera Module circuit poor electrical connection

How to Fix the DTC U18C2?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U18C2 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U18C2 code?

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Information for Specific Makes

U18C2 Buick — Lost Communication With Frontview Camera Module On Flexray Bus
U18C2 Cadillac — Lost Communication With Frontview Camera Module On Flexray Bus
U18C2 Chevrolet — Lost Communication With Frontview Camera Module On Flexray Bus
U18C2 GMC — Lost Communication With Frontview Camera Module On Flexray Bus

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U18C2 Code

1. What does the OBDII code U18C2 mean?

The U18C2 code indicates a loss of communication between the vehicle's main control modules and the Frontview Camera Module on the FlexRay communication bus.

2. What are the common symptoms of the U18C2 code?

Symptoms may include a malfunctioning forward collision warning system, lane departure warnings not working, adaptive cruise control issues, or warning lights on the dashboard.

3. What causes the U18C2 code to appear?

Common causes include a faulty Frontview Camera Module, damaged wiring or connectors in the FlexRay bus, or a communication fault between modules.

4. Can the U18C2 code cause drivability issues?

Generally, it does not affect basic drivability, but it can disable advanced driver-assistance systems (ADAS), impacting safety features.

5. How can I diagnose the U18C2 code?

Diagnosis involves checking the Frontview Camera Module, inspecting the FlexRay wiring and connectors for damage, and using a scan tool to verify communication with the module.

6. Is the U18C2 code related to a specific vehicle brand?

While this code can apply to various vehicles, it is common in models with advanced safety systems and FlexRay communication networks, such as GM, BMW, or Mercedes-Benz.

7. Can I clear the U18C2 code without fixing the issue?

Clearing the code without addressing the root cause may temporarily clear the warning but the issue will likely return until repairs are made.

8. How do I fix the U18C2 code?

Repairs may include replacing the Frontview Camera Module, repairing or replacing damaged wiring, or updating the vehicle's software to restore proper communication.

9. Can a software update fix the U18C2 code?

In some cases, a software update for the affected modules can resolve communication issues, especially if the problem is related to outdated firmware.

10. What tools are needed to troubleshoot the U18C2 code?

Youâ€™ll need a professional-grade scan tool capable of reading manufacturer-specific codes and accessing the FlexRay network, as well as basic electrical testing tools.