AutoCodes – Buick – U18C2 Buick

U18C2 Buick 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 Buick 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 453

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

What does this mean?

What are the Possible Causes of the DTC U18C2 Buick?

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 Buick?

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 Buick 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 Buick Code

What does the OBDII code U18C2 mean on a Buick?

1. The U18C2 code indicates a loss of communication with the Frontview Camera Module on the FlexRay bus, a high-speed communication system used in modern vehicles. 2.

What are common symptoms of the U18C2 code on a Buick?

Symptoms may include non-functional or erratic operation of advanced driver-assistance systems (ADAS) like lane-keeping assist, forward collision warning, or adaptive cruise control. 3.

What causes the U18C2 code to trigger?

The code can be caused by wiring issues, a faulty Frontview Camera Module, a problem with the FlexRay bus network, or a software glitch in one of the associated control modules. 4.

Can I drive my Buick with the U18C2 code active?

While the vehicle might still be drivable, safety features like lane departure warning or automatic emergency braking may not function properly, increasing the risk of accidents. 5.

How can I diagnose the U18C2 code on a Buick?

Use a scan tool capable of reading FlexRay network data to check for related codes, inspect the wiring and connectors to the Frontview Camera Module, and verify module communication on the network. 6.

What are common repair steps for the U18C2 code?

Repairs may include checking and repairing damaged wiring, cleaning or reconnecting loose connectors, updating module software, or replacing the Frontview Camera Module if it is defective. 7.

Can a dead battery cause the U18C2 code?

Yes, a low or dead battery can disrupt communication on the FlexRay bus, potentially triggering the U18C2 code. Ensure the battery and charging system are functioning properly. 8.

How much does it cost to repair the U18C2 code on a Buick?

The cost depends on the root cause. Simple fixes like wiring repairs or software updates may cost $100â€“$200, while module replacement could cost $500â€“$1,200 or more, including parts and labor. 9.

Is the U18C2 code specific to Buicks?

No, the U18C2 code can appear on other vehicles using FlexRay networks and Frontview Camera Modules, but the exact symptoms and fixes may vary by manufacturer and model. 10.

Can a software update resolve the U18C2 code?

In some cases, yes. If the issue is caused by a glitch in the moduleâ€™s software, updating the control module software may resolve the communication error.