AutoCodes – Generic – U01B0

U01B0 Code - Lost Communication With Battery Monitor 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 Monitor Module, Battery Monitor Module harness is open or shorted, Battery Monitor 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: U01B0 indicates Lost Communication With Battery Monitor Module.
Common causes: Common causes include Faulty Battery Monitor Module, Battery Monitor Module harness is open or shorted, Battery Monitor 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 33,956

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 Apr 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U01B0 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 Monitor Module has not been received.

OBDII Code U01B0 - Lost Communication With Battery Monitor Module - AutoCodes.com — U01B0 Code - Lost Communication With Battery Monitor Module

What does this mean?

What are the Possible Causes of the DTC U01B0?

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

How to Fix the DTC U01B0?

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 U01B0 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 U01B0 code?

Need more information on how to fix the U01B0 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U01B0 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U01B0 Buick — Lost Communication With Battery Monitor Module
U01B0 Cadillac — Lost Communication With Battery Monitor Module
U01B0 Chevrolet — Lost Communication With Battery Monitor Module
U01B0 GMC — Lost Communication With Battery Monitor 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 U01B0 Code

1. What are common symptoms of OBDII code U01B0 (Lost Communication With Battery Monitor Module)?

- Common symptoms include a check engine light, loss of battery monitoring function, and potential issues with battery performance.

2. What can cause the OBDII code U01B0 to trigger?

- The code U01B0 can be triggered by issues like a faulty battery monitor module, damaged wiring or connectors, or a communication breakdown between the module and the vehicle's system.

3. How can I diagnose the cause of the U01B0 code?

- To diagnose the U01B0 code, it is recommended to perform a thorough inspection of the battery monitor module, check the wiring and connectors for damage, and use an OBDII scanner to retrieve additional diagnostic trouble codes.

4. What are some repair tips for addressing the U01B0 code?

- Repair tips for the U01B0 code may include repairing or replacing the battery monitor module, repairing damaged wiring or connectors, and ensuring proper communication between the module and the vehicle's system.

5. Can I drive my vehicle with the U01B0 code present?

- It is not advisable to drive your vehicle with the U01B0 code present, as it can lead to potential issues with battery performance and monitoring.

6. How much does it typically cost to repair the U01B0 code?

- The cost of repairing the U01B0 code can vary depending on the underlying cause, but it may involve expenses for parts replacement and labor costs.

7. Is the U01B0 code a serious issue that requires immediate attention?

- While the U01B0 code may not cause immediate drivability issues, it is still recommended to address the problem promptly to prevent potential battery-related problems in the future.

8. Can a DIY enthusiast fix the U01B0 code at home?

- Depending on the underlying cause, a DIY enthusiast with the necessary tools and knowledge may be able to address the U01B0 code at home by following repair guides or consulting with a professional.

9. Will resetting the trouble codes make the U01B0 code disappear?

- Resetting the trouble codes may temporarily clear the U01B0 code, but if the underlying issue is not addressed, the code is likely to reappear after driving the vehicle.

10. How long does it take to repair the U01B0 code?

- The repair time for the U01B0 code can vary based on the specific cause and complexity of the issue, but it may take a few hours to a full day to diagnose and address the problem effectively.