AutoCodes – GMC – U18C2 GMC

U18C2 GMC 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 GMC 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 448

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

What does this mean?

What are the Possible Causes of the DTC U18C2 GMC?

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 GMC?

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 GMC 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.

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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 GMC Code

1. What are the common symptoms of OBDII code U18C2 GMC?

- Common symptoms may include loss of communication with the frontview camera module, malfunctioning camera system, warning lights on the dashboard, and issues with advanced driver assistance systems.

2. What are the possible causes of OBDII code U18C2 GMC?

- Possible causes include damaged wiring or connectors related to the frontview camera module, a faulty camera module itself, issues with the Flexray communication bus, or software glitches.

3. How can I diagnose the OBDII code U18C2 GMC?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the code, checking the frontview camera module connections, inspecting the wiring harness for damage, and testing the communication signals on the Flexray bus.

4. Is it safe to continue driving with OBDII code U18C2 GMC?

- It is recommended to address the issue as soon as possible to ensure the proper functioning of safety systems relying on the frontview camera module. Continued driving without resolving the problem may compromise certain safety features.

5. How can I repair OBDII code U18C2 GMC?

- Repair options may include fixing or replacing damaged wiring, repairing connectors, replacing the frontview camera module if faulty, resetting the system, and conducting a software update if needed.

6. Can a DIY enthusiast fix OBDII code U18C2 GMC?

- While some basic troubleshooting steps can be performed by enthusiasts, diagnosing and repairing issues related to the frontview camera module and Flexray communication bus may require advanced knowledge and specialized tools, making professional assistance advisable.

7. How much does it cost to fix OBDII code U18C2 GMC?

- The cost of fixing this code can vary depending on the root cause of the issue, the need for parts replacement, labor costs, and whether the repair is done at a dealership or an independent repair shop. It's recommended to obtain multiple quotes for an accurate estimate.

8. Can a software update resolve OBDII code U18C2 GMC?

- In some cases, performing a software update on the affected modules may resolve communication issues and clear the code. It's advisable to consult with a qualified technician to determine if a software update is a viable solution.

9. Will resetting the OBDII code U18C2 GMC clear the issue permanently?

- Simply clearing the code without addressing the underlying problem will likely result in the code reappearing once the system detects the communication issue again. It's crucial to diagnose and repair the root cause for a permanent solution.

10. How long does it take to repair OBDII code U18C2 GMC?

- The repair time can vary based on the complexity of the issue, the availability of parts, and the expertise of the technician. Some repairs can be completed within a few hours, while others may require more time for thorough diagnostics and repair work.