AutoCodes – Chevrolet – U18C2 Chevrolet

U18C2 Chevrolet 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 Chevrolet 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 716

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

What does this mean?

What are the Possible Causes of the DTC U18C2 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet Code

1. What does the OBDII code U18C2 mean on a Chevrolet?

The U18C2 code indicates a loss of communication with the Frontview Camera Module on the FlexRay bus, a high-speed communication network used in modern vehicles.

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

Common symptoms include malfunctioning or disabled advanced driver assistance systems (ADAS) like lane departure warning, forward collision alert, or automatic emergency braking.

3. What causes the U18C2 code to appear?

Typical causes include a faulty Frontview Camera Module, damaged wiring or connectors on the FlexRay bus, software glitches, or issues with the vehicle's power and grounding circuits.

4. Can a weak battery trigger the U18C2 code?

Yes, a weak or failing battery can cause communication errors, including the U18C2 code, due to insufficient voltage to the modules.

5. How is the U18C2 code diagnosed?

Diagnosis involves scanning for additional codes, inspecting the wiring and connectors related to the Frontview Camera Module, checking power and ground connections, and performing module communication tests.

6. Can the U18C2 code cause safety issues?

Yes, since it affects ADAS functions like forward collision warning and automatic braking, it can reduce vehicle safety in certain driving conditions.

7. Can a software update fix the U18C2 code?

In some cases, a software update to the Frontview Camera Module or related control modules may resolve the issue if it's caused by a programming glitch.

8. How do you repair the U18C2 code?

Repairs may include replacing the Frontview Camera Module, repairing damaged wiring or connectors, updating software, or addressing power and grounding issues.

9. Is it safe to drive with the U18C2 code active?

While the vehicle may still be drivable, critical safety features like collision alerts and lane-keeping assistance may not function, so caution is advised.

10. How much does it cost to fix the U18C2 code?

Repair costs vary depending on the cause but may range from $100 for minor wiring repairs to over $1,000 if module replacement and reprogramming are required.