AutoCodes – Cadillac – U18C2 Cadillac

U18C2 Cadillac 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 Cadillac 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 689

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC U18C2 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac code?

Need more information on how to fix the U18C2 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U18C2 Cadillac code diagnosed by a professional: Find a repair shop in your area

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 Cadillac Code

1. What are the common symptoms of OBDII code U18C2 in a Cadillac related to lost communication with the Frontview Camera Module on the Flexray bus?

- Common symptoms include a malfunction indicator light (MIL) illuminated on the dashboard, loss of functionality of the front view camera system, and potential issues with advanced driver assistance systems (ADAS).

2. What are some possible causes of the U18C2 trouble code in a Cadillac?

- The U18C2 code can be triggered by faults such as damaged wiring or connectors, a faulty Frontview Camera Module, a communication bus fault, or a software issue within the system.

3. How can I diagnose the U18C2 code in my Cadillac with the Frontview Camera Module issue?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the code, checking the wiring and connectors for damage, testing the Frontview Camera Module for functionality, and inspecting the Flexray communication bus for any faults.

4. Is it safe to continue driving my Cadillac with the U18C2 trouble code present?

- It is recommended to address the issue promptly to ensure the proper functioning of the front view camera system and other related safety features. Continuing to drive with unresolved communication issues may compromise vehicle safety.

5. Can I repair the U18C2 code related to the Frontview Camera Module on my Cadillac at home?

- Depending on your level of automotive expertise, you may be able to address simple causes such as loose connectors or damaged wiring at home. However, complex issues with the Frontview Camera Module or communication bus may require professional diagnosis and repair.

6. What are some tips for preventing the U18C2 trouble code from recurring in my Cadillac?

- Regular maintenance, checking for loose connections, and addressing any related issues promptly can help prevent the U18C2 trouble code from recurring in the future.

7. How much does it cost to repair the U18C2 trouble code related to the Frontview Camera Module on a Cadillac?

- Repair costs can vary depending on the specific cause of the issue. Simple fixes such as reconnecting loose wiring may be inexpensive, while replacing the Frontview Camera Module or addressing communication bus faults can be more costly.

8. Are there any technical service bulletins (TSBs) related to the U18C2 trouble code in Cadillac vehicles?

- Checking with a Cadillac dealership or online resources for any relevant TSBs can provide valuable information on common issues and recommended fixes for the U18C2 trouble code.

9. Can the U18C2 code be triggered by other faults in the vehicle's electrical system besides the Frontview Camera Module?

- While the U18C2 code is specifically related to lost communication with the Frontview Camera Module on the Flexray bus, other electrical faults or communication issues in the vehicle may trigger similar codes and symptoms.

10. How long does it typically take to repair the U18C2 trouble code in a Cadillac at a professional repair shop?

- The repair time can vary depending on the complexity of the issue and the availability of parts. Simple fixes may be completed quickly, while more involved repairs could take several hours or longer to diagnose and address.