AutoCodes – GMC – P0B5B GMC

P0B5B GMC Code - Hybrid/Electric Vehicle Battery 7 Circuit Low Voltage

Quick Answer

The Hybrid/Electric Vehicle battery pack contains 288 cells. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module. 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: P0B5B GMC indicates Hybrid/Electric Vehicle Battery 7 Circuit Low Voltage.
Common causes: Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module.
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 968

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B5B GMC Description

The Hybrid/Electric Vehicle battery pack contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack assembly. These cell groups are electrically connected in-series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V direct current. The battery cells are also grouped together into three sections. The first 90 cells/30 cell groups make up battery section one. This section is adjacent to the cowl and contains batteries 67 through to 96. Battery section two is located behind section one. It is made up of 72 cells/24 cell groups and contains batteries 43 through to 66. The transverse battery section is section number three, it is made up of the remaining 126 cells/42 cell groups and contains batteries 1 through to 42. The three battery sections are individually serviceable components.
The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules. Voltage sense circuits are attached to each individual cell group, and these sense circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness joins this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P0B5B GMC - Hybrid/Electric Vehicle Battery 7 Circuit Low Voltage - AutoCodes.com — P0B5B GMC Code - Hybrid/Electric Vehicle Battery 7 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0B5B GMC?

Faulty Hybrid/Electric Vehicle Battery Pack
Faulty Hybrid/Electric Vehicle Battery Interface Control Module

How to Fix the DTC P0B5B 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 P0B5B 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 P0B5B GMC Code

1. What are the common symptoms of OBDII code P0B5B GMC?

- Common symptoms include the hybrid/electric vehicle not starting, reduced power or acceleration, and the battery not charging properly.

2. What are the possible causes of OBDII code P0B5B GMC?

- Possible causes include a faulty hybrid/electric vehicle battery, issues with the battery management system, wiring or connection problems, or a defective electronic control module.

3. How can I diagnose the source of OBDII code P0B5B GMC?

- A thorough inspection of the hybrid/electric vehicle battery components, wiring, and connections is essential. Using a diagnostic scan tool to retrieve specific trouble codes and data can help pinpoint the issue.

4. Can I drive my vehicle with OBDII code P0B5B GMC?

- It is not recommended to drive the vehicle with this code present, as it may lead to further damage to the hybrid/electric vehicle system. Seek professional assistance to diagnose and repair the issue.

5. What are some repair tips for fixing OBDII code P0B5B GMC?

- Repair tips may include checking and cleaning battery terminals, inspecting wiring harnesses for damage, testing the battery voltage, and ensuring all connections are secure and free of corrosion.

6. Is it safe to reset the OBDII code P0B5B GMC and continue driving?

- It is not advisable to simply reset the code without addressing the underlying issue. Resetting the code may temporarily clear the warning, but the problem will likely persist and could worsen over time.

7. How much does it typically cost to repair OBDII code P0B5B GMC?

- The cost of repair can vary depending on the specific cause of the code and the extent of the damage. It's recommended to consult with a qualified mechanic or dealership for an accurate estimate.

8. Can a DIY enthusiast fix OBDII code P0B5B GMC at home?

- While some basic troubleshooting steps can be performed at home, diagnosing and repairing issues related to hybrid/electric vehicle systems often require specialized knowledge and tools. Professional help is recommended.

9. What are the long-term consequences of ignoring OBDII code P0B5B GMC?

- Ignoring this code can lead to further damage to the hybrid/electric vehicle system, potentially resulting in more expensive repairs or even complete system failure. It's crucial to address the issue promptly.

10. How can I prevent OBDII code P0B5B GMC from recurring in the future?

- Regular maintenance of the hybrid/electric vehicle system, including checking the battery health, keeping connections clean and secure, and addressing any warning signs promptly, can help prevent the recurrence of this code.