AutoCodes – Cadillac – U2108 Cadillac

U2108 Cadillac 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 Cadillac 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 1,694

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

What does this mean?

What are the Possible Causes of the DTC U2108 Cadillac?

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 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 U2108 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.

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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 Cadillac Code

What does OBDII code U2108 mean for my Cadillac?

OBDII code U2108 indicates a "Lost Communication With Electronic Brake Control Module," meaning the vehicle's computer is unable to communicate with the electronic brake control module.

What are the common symptoms of the U2108 code?

Common symptoms include warning lights on the dashboard, such as the ABS or brake warning light, erratic braking behavior, and loss of anti-lock braking system (ABS) functionality.

What can cause the U2108 code to trigger?

Causes can include a faulty electronic brake control module, damaged wiring or connectors, issues with the vehicle's communication network, or problems with the power supply to the module.

How can I diagnose the U2108 code?

To diagnose the U2108 code, check for other stored codes using an OBDII scanner, inspect wiring and connectors for damage, and test the electronic brake control module for functionality.

What steps should I take to repair the U2108 code?

Repair steps include checking and repairing any damaged wiring or connectors, ensuring proper power and ground to the electronic brake control module, and possibly replacing the module if it is found to be faulty.

Is it safe to drive my Cadillac with the U2108 code?

Driving with the U2108 code is not recommended, as it may lead to reduced braking performance and an increased risk of accidents. Itâ€™s best to address the issue as soon as possible.

Can I reset the U2108 code myself?

You can reset the U2108 code using an OBDII scanner, but if the underlying issue is not resolved, the code will likely reappear.

Will clearing the U2108 code fix the problem?

No, clearing the code will not fix the underlying issue. The root cause must be identified and repaired for the problem to be resolved permanently.

What should I do if the U2108 code keeps coming back?

If the U2108 code keeps returning, itâ€™s advisable to consult a professional mechanic who can perform a thorough diagnosis and repair any underlying issues with the brake control system.