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Engine-Codes – Generic – U0112

U0112 Code - Lost Communication With Battery Energy Control Module 'B'

Quick Answer

The U0112 diagnostic trouble code refers to a communication error between the vehicle's onboard computer system and the Battery Energy Control Module 'B'. Common causes include Faulty Wiring: Damaged or corroded wiring connections between the vehicle's computer system and the Battery Energy Control Module can trigger the U0112 code, Defective Battery Energy Control Module: A malfunctioning module itself can cause communication errors and lead to the U0112 code, Software Issues: Software glitches within the vehicle's computer system can disrupt communication with the Battery Energy Control Module 'B'. 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
U0112 indicates Lost Communication With Battery Energy Control Module 'B'.
Common causes
Common causes include Faulty Wiring: Damaged or corroded wiring connections between the vehicle's computer system and the Battery Energy Control Module can trigger the U0112 code, Defective Battery Energy Control Module: A malfunctioning module itself can cause communication errors and lead to the U0112 code, Software Issues: Software glitches within the vehicle's computer system can disrupt communication with the Battery Energy Control Module 'B'.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code U0112 Description

The U0112 diagnostic trouble code refers to a communication error between the vehicle's onboard computer system and the Battery Energy Control Module 'B'. This module is responsible for managing the energy flow in hybrid and electric vehicles, ensuring efficient operation of the battery and electrical components. When communication is lost with this module, it can lead to a range of issues affecting the vehicle's performance and drivability.

OBDII Code U0112 - Lost Communication With Battery Energy Control Module 'B'
U0112 Code - Lost Communication With Battery Energy Control Module 'B'

Common Causes of U0112

  1. Faulty Wiring: Damaged or corroded wiring connections between the vehicle's computer system and the Battery Energy Control Module can trigger the U0112 code.
  2. Defective Battery Energy Control Module: A malfunctioning module itself can cause communication errors and lead to the U0112 code.
  3. Software Issues: Software glitches within the vehicle's computer system can disrupt communication with the Battery Energy Control Module 'B'.
  4. Network Communication Problems: Issues with the vehicle's communication network, such as a faulty CAN bus, can also be a potential cause of the U0112 code.

Symptoms of U0112

  1. Check Engine Light: The most common symptom associated with the U0112 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: Communication errors with the Battery Energy Control Module 'B' can lead to decreased fuel efficiency in hybrid vehicles due to inefficient energy management.
  3. Erratic Battery Charging: The vehicle may experience erratic behavior in battery charging, leading to issues with maintaining optimal battery levels.
  4. Loss of Electric Drive Mode: In hybrid vehicles, the loss of communication with the Battery Energy Control Module 'B' can result in the inability to operate in electric drive mode.

How to Fix U0112

  1. Diagnostic Scan: The first step in addressing the U0112 code is to perform a comprehensive diagnostic scan to identify the exact cause of the communication failure.
  2. Check Wiring and Connectors: Inspect the wiring harness and connectors between the vehicle's computer system and the Battery Energy Control Module for any damage or corrosion.
  3. Test Battery Energy Control Module: Test the functionality of the Battery Energy Control Module to determine if it is faulty and needs replacement.
  4. Software Update: If software glitches are identified as the cause, updating the vehicle's software may resolve the communication error with the module.
  5. Repair or Replace Components: Depending on the diagnosis, repair or replace any damaged components, such as wiring, connectors, or the Battery Energy Control Module, to address the U0112 code.

Cost to Fix U0112

The typical repair costs for addressing the U0112 code can vary depending on the specific cause of the communication error. In general, expect to pay anywhere from $200 to $500 for parts and labor to diagnose and repair this issue. However, it's important to note that actual costs may vary based on factors such as the vehicle make and model, the location of the repair shop, and the extent of the repairs needed. Diagnostic time and labor rates at auto repair shops typically range from $80 to $150 per hour, so it's advisable to obtain a detailed estimate from a qualified technician before proceeding with the repairs.

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Code U0112 Information for Specific Makes

  • U0112 BMW — Lost Communication With Battery Energy Control Module
  • U0112 Buick — Lost Communication With Battery Energy Control Module
  • U0112 Cadillac — Lost Communication With Battery Energy Control Module
  • U0112 Chevrolet — Lost Communication With Battery Energy Control Module
  • U0112 GMC — Lost Communication With Battery Energy Control Module
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 U0112 Code

1. What are the common symptoms of OBDII code U0112?

When U0112 is triggered, common symptoms may include loss of communication with the battery energy control module, warning lights on the dashboard, and potential issues with the vehicle's hybrid or electric powertrain system.

2. What can cause the OBDII code U0112 to appear?

The U0112 code is typically caused by a communication failure between the powertrain control module (PCM) and the battery energy control module 'B'. This can be due to wiring issues, damaged connectors, or a faulty control module.

3. How serious is the U0112 code?

The U0112 code should be addressed promptly, as it indicates a communication problem between critical modules in the vehicle. Ignoring this code can lead to performance issues, reduced fuel efficiency, and potential safety concerns.

4. Can I still drive my vehicle with the U0112 code?

It is not recommended to drive the vehicle when the U0112 code is present, as it can affect the proper functioning of the hybrid or electric powertrain system. It's best to have the issue diagnosed and repaired before continuing to drive.

5. How can I diagnose the U0112 code?

Diagnosing the U0112 code typically involves using a professional OBDII scanner to retrieve the trouble codes, checking the wiring and connectors for damage, and testing the battery energy control module 'B' for proper functionality.

6. What are some repair tips for fixing the U0112 code?

Repairing the U0112 code may involve repairing or replacing damaged wiring, connectors, or components related to the battery energy control module 'B'. It's important to follow the manufacturer's diagnostic and repair procedures for an effective fix.

7. Can I reset the U0112 code on my own?

While you can clear the U0112 code with an OBDII scanner, it is recommended to address the underlying issue causing the code to prevent it from reoccurring. Simply clearing the code without fixing the problem may result in further issues.

8. How much does it cost to repair the U0112 code?

The cost of repairing the U0112 code can vary depending on the extent of the issue, the specific repairs needed, and labor costs. It's best to consult with a professional mechanic or dealership for an accurate estimate.

9. Is the U0112 code common in specific vehicle makes and models?

The U0112 code can be found in various hybrid or electric vehicles that use a battery energy control module 'B'. It is not limited to a specific make or model, but it is more common in vehicles with hybrid or electric powertrains.

10. Can a DIY enthusiast fix the U0112 code?

While some DIY enthusiasts may have the skills to diagnose and repair the U0112 code, it is a complex issue related to the vehicle's powertrain system. It is recommended to seek assistance from a professional mechanic or dealership for proper diagnosis and repair.

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