AutoCodes – GMC – U2107 GMC

U2107 GMC Code - Lost Communication With Body 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 Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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: U2107 GMC indicates Lost Communication With Body Control Module.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body 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 1,094

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 U2107 GMC 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 U2107 GMC - Lost Communication With Body Control Module - AutoCodes.com — U2107 GMC Code - Lost Communication With Body Control Module

What does this mean?

What are the Possible Causes of the DTC U2107 GMC?

Faulty Body Control Module (BCM)
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection

How to Fix the DTC U2107 GMC?

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 U2107 GMC 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 U2107 GMC Code

1. What are common symptoms of the U2107 GMC OBDII code?

Common symptoms include issues with power windows, door locks, interior lights, and other body control module functions.

2. What are some possible causes of the U2107 code?

Possible causes include a faulty body control module, damaged wiring, poor connections, or a software glitch in the vehicle's system.

3. How can I diagnose the U2107 code?

Diagnosing the U2107 code typically involves using a professional OBDII scanner to read the code and investigate the body control module and related wiring for any issues.

4. Can I still drive my vehicle with the U2107 code present?

It is generally safe to drive your vehicle with the U2107 code, but it is recommended to address the issue promptly to avoid potential further complications.

5. How can I repair the U2107 code?

Repairing the U2107 code often involves checking and repairing any damaged wiring, ensuring proper connections, or replacing the body control module if necessary.

6. Will resetting the code make it go away permanently?

Resetting the code may temporarily clear the warning, but if the underlying issue causing the U2107 code is not resolved, it is likely to reappear.

7. How much does it cost to fix the U2107 code?

The cost of fixing the U2107 code can vary depending on the specific cause of the issue, but it may involve expenses for parts, labor, and diagnostic fees.

8. Can a DIY enthusiast fix the U2107 code?

While some DIY enthusiasts may be able to address simple causes of the U2107 code, more complex issues may require professional diagnosis and repair.

9. How long does it take to repair the U2107 code?

The time needed to repair the U2107 code can vary based on the cause of the problem, the availability of parts, and the expertise of the technician handling the repair.

10. Can the U2107 code be prevented in the future?

Regular vehicle maintenance, checking for wiring damage, and addressing any electrical issues promptly can help prevent the recurrence of the U2107 code in the future.