AutoCodes – Chevrolet – U2107 Chevrolet

U2107 Chevrolet 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 Chevrolet 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 10,388

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

What does this mean?

What are the Possible Causes of the DTC U2107 Chevrolet?

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 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 U2107 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 U2107 Chevrolet Code

1. What are the common symptoms of OBDII code U2107 in a Chevrolet indicating a lost communication with the Body Control Module (BCM)?

- Common symptoms include issues with power windows, door locks, interior lights, and other electronic components controlled by the BCM.

2. What are some possible causes for the U2107 code in a Chevrolet?

- The code may be triggered by a faulty BCM, damaged wiring or connectors, a drained battery, or a software glitch within the BCM system.

3. How can I diagnose the U2107 code related to a lost communication with the BCM in my Chevrolet?

- Use an OBDII scanner to retrieve the specific error codes, inspect the wiring and connectors for any damage, and perform a BCM reset to see if the communication is restored.

4. Can a DIY enthusiast repair the U2107 code issue in a Chevrolet, or is professional help necessary?

- While some minor wiring checks and resets can be done by a DIY enthusiast, resolving complex BCM issues may require professional diagnosis and repair.

5. What are some tips for troubleshooting and repairing the U2107 code in a Chevrolet?

- Start by checking the fuses related to the BCM, ensuring proper battery voltage, and inspecting the BCM connectors for corrosion or looseness before seeking professional help if needed.

6. Is it safe to continue driving my Chevrolet with the U2107 code indicating a communication problem with the BCM?

- It is advisable to address the issue promptly to prevent potential malfunctions in critical systems controlled by the BCM, ensuring the safety and proper functionality of the vehicle.

7. How much does it typically cost to repair the U2107 code in a Chevrolet at a dealership or a certified repair shop?

- The cost can vary depending on the exact cause of the issue, but repairs related to the U2107 code may range from $100 to $500 or more, including parts and labor.

8. Can intermittent communication problems with the BCM trigger the U2107 code in a Chevrolet?

- Yes, intermittent communication issues between the BCM and other modules or sensors can trigger the U2107 code, requiring thorough diagnosis to pinpoint the root cause.

9. Are there any recalls or technical service bulletins related to the U2107 code in Chevrolet vehicles?

- It's recommended to check with a Chevrolet dealership or the manufacturer's website for any recalls or technical service bulletins addressing the U2107 code and related BCM communication issues.

10. What is the role of the Body Control Module in a Chevrolet, and why is it important to address communication issues with this module promptly?

- The BCM controls various electrical components and functions in the vehicle, such as lighting, door locks, and security systems. Promptly addressing communication issues with the BCM ensures the proper operation of these essential functions.