AutoCodes – Buick – U2108 Buick

U2108 Buick Code - Lost Communication With Electronic Brake Control Module

Quick Answer

Modules connected to the Controller Area Network (CAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control 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: U2108 Buick indicates Lost Communication With Electronic Brake Control Module.
Common causes: Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control 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 632

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 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2108 Buick Description

Modules connected to the Controller Area Network (CAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. Each message contains the identification number of the transmitter module. A module with a CAN serial data circuits malfunction or which loses power during the current ignition cycle will have a Loss of Communication Diagnostic Trouble Code (DTC) set by other modules that depend on information from that failed module. If any of the CAN circuit are shorted to battery voltage, ground, or between them no communication is possible on the CAN serial data bus, a Diagnostic Trouble Code will set.

OBDII Code U2108 Buick - Lost Communication With Electronic Brake Control Module - AutoCodes.com — U2108 Buick Code - Lost Communication With Electronic Brake Control Module

What does this mean?

What are the Possible Causes of the DTC U2108 Buick?

Faulty Electronic Brake Control Module (EBCM)
Electronic Brake Control Module harness is open or shorted
Electronic Brake Control Module circuit poor electrical connection

How to Fix the DTC U2108 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 U2108 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 U2108 Buick Code

What does the OBDII code U2108 mean for a Buick vehicle?

U2108 indicates a lost communication with the Electronic Brake Control Module (EBCM), which can affect the vehicle's braking system.

What are common symptoms associated with the U2108 code?

Symptoms may include warning lights on the dashboard (such as the ABS or brake light), reduced braking performance, and problems with traction control or stability.

What could cause the U2108 code to trigger?

Potential causes include wiring issues, a faulty EBCM, poor connections, or a malfunctioning transmission control module.

How can I diagnose the U2108 code effectively?

Start by checking the vehicleâ€™s wiring and connectors for damage or corrosion. Use a scan tool to assess communication between modules and look for additional codes.

Is it safe to drive a vehicle with a U2108 code?

It may not be safe to drive, as the braking system could be compromised. It's advisable to have the issue diagnosed and repaired promptly.

What are some common repair solutions for the U2108 code?

Repairs may involve fixing or replacing damaged wiring, reprogramming or replacing the EBCM, or addressing any other related module communication issues.

Can I reset the U2108 code myself?

You can clear the code with an OBDII scanner, but if the underlying issue is not resolved, the code is likely to reappear.

How much might it cost to fix the U2108 code?

Repair costs can vary widely depending on the cause, ranging from simple wiring repairs to more expensive EBCM replacement, typically between $100 and $800.

Should I consult a professional mechanic for a U2108 code?

Yes, consulting a professional is recommended, especially if you lack experience with automotive repairs, as they can provide a thorough diagnosis and reliable repairs.