AutoCodes – GMC – U0111 GMC

U0111 GMC Code - Lost Communication With Battery Energy Control Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy 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: U0111 GMC indicates Lost Communication With Battery Energy Control Module.
Common causes: Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 662

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 Mar 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U0111 GMC Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) 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, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Battery Energy Control Module has not been received.

OBDII Code U0111 GMC - Lost Communication With Battery Energy Control Module - AutoCodes.com — U0111 GMC Code - Lost Communication With Battery Energy Control Module

What does this mean?

What are the Possible Causes of the DTC U0111 GMC?

Faulty Battery Energy Control Module
Battery Energy Control Module harness is open or shorted
Battery Energy Control Module circuit poor electrical connection

How to Fix the DTC U0111 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 U0111 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.

Need more information about the U0111 GMC code?

Need more information on how to fix the U0111 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0111 GMC code diagnosed by a professional: Find a repair shop in your area

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 U0111 GMC Code

1. What are common symptoms of OBDII code U0111 in a GMC related to the Battery Energy Control Module (BECM)?

- Common symptoms include loss of communication with the BECM, illuminated dashboard warning lights, and issues with hybrid system performance.

2. What are some possible causes of the U0111 code indicating lost communication with the Battery Energy Control Module in a GMC?

- Possible causes include a faulty BECM, damaged wiring or connectors, software issues, or a weak battery affecting communication.

3. How can I diagnose the U0111 code in my GMC to determine if the issue is related to the Battery Energy Control Module?

- Diagnosis typically involves using a diagnostic scan tool to retrieve the specific trouble codes and checking for communication errors with the BECM.

4. What are some repair tips for addressing the U0111 OBDII code indicating lost communication with the BECM in a GMC?

- Repair tips may include checking and repairing damaged wiring, ensuring proper connections to the BECM, updating software if necessary, or replacing the BECM if it is deemed faulty.

5. Can the U0111 code related to the Battery Energy Control Module issue in a GMC be fixed without professional help?

- While some basic checks like inspecting connections can be done by DIY enthusiasts, resolving complex issues with the BECM may require professional diagnostic equipment and expertise.

6. Are there any safety concerns associated with the U0111 code in a GMC related to the BECM?

- Safety concerns may arise if the communication issue affects critical hybrid system functions, potentially leading to reduced performance or reliability. It is advisable to address the issue promptly.

7. How urgent is it to address the U0111 code indicating lost communication with the Battery Energy Control Module in a GMC?

- It is recommended to address this code promptly to prevent potential issues with the hybrid system's performance and to ensure proper communication between vehicle components.

8. Can a weak battery cause the U0111 code to appear in a GMC due to communication issues with the BECM?

- Yes, a weak battery can impact communication between modules, including the BECM, leading to the U0111 code. Ensuring a healthy battery can help prevent such issues.

9. Are there any recalls or technical service bulletins related to the U0111 code in GMC vehicles specifically concerning the Battery Energy Control Module?

- It's advisable to check with a GMC dealership or online resources for any recalls or technical service bulletins related to the U0111 code and communication issues with the BECM.

10. How can regular maintenance help prevent issues like the U0111 code related to the Battery Energy Control Module in a GMC?

- Regular maintenance, including checking battery health, inspecting wiring and connectors, and keeping software up to date, can help prevent issues leading to the U0111 code and ensure optimal vehicle performance.