AutoCodes – Chevrolet – P0B5B Chevrolet

P0B5B Chevrolet 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 Chevrolet 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 980

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

What does this mean?

What are the Possible Causes of the DTC P0B5B Chevrolet?

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

How to Fix the DTC P0B5B 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 P0B5B 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 P0B5B Chevrolet Code

1. What are the common symptoms of OBDII code P0B5B in a Chevrolet hybrid/electric vehicle?

- Common symptoms include reduced electric vehicle range, difficulty starting the vehicle, and the illumination of the check engine light.

2. What can cause the OBDII code P0B5B in a Chevrolet hybrid/electric vehicle?

- The code P0B5B typically indicates a malfunction in Hybrid/Electric Vehicle Battery 7 Circuit Low Voltage, which can be caused by a faulty battery pack, damaged wiring, or a problem with the battery management system.

3. How can I diagnose the OBDII code P0B5B in my Chevrolet hybrid/electric vehicle?

- Diagnosing this code usually requires specialized equipment and knowledge. It's recommended to consult a qualified technician or a dealership with experience in hybrid/electric vehicle diagnostics.

4. Is it safe to continue driving my Chevrolet hybrid/electric vehicle with the OBDII code P0B5B present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the battery system or other components. Seek professional assistance as soon as possible.

5. Can I reset the OBDII code P0B5B in my Chevrolet hybrid/electric vehicle myself?

- While you may be able to clear the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring. Consult a professional for proper diagnosis and repair.

6. What are some repair tips for fixing the OBDII code P0B5B in a Chevrolet hybrid/electric vehicle?

- Repair tips may involve checking the battery pack connections, inspecting the wiring harness for damage, and ensuring the battery management system is functioning correctly. It's best to have a qualified technician perform these tasks.

7. How much does it typically cost to repair the OBDII code P0B5B in a Chevrolet hybrid/electric vehicle?

- Repair costs can vary depending on the extent of the issue and the specific components that need to be repaired or replaced. It's advisable to obtain a diagnostic and repair estimate from a reputable service provider.

8. Can the OBDII code P0B5B be a false alarm in a Chevrolet hybrid/electric vehicle?

- While false alarms are possible, it is crucial to investigate the code thoroughly to rule out any genuine issues with the Hybrid/Electric Vehicle Battery 7 Circuit Low Voltage system to ensure the vehicle's safety and performance.

9. How often should I have the battery system in my Chevrolet hybrid/electric vehicle inspected to prevent OBDII code P0B5B from occurring?

- Regular maintenance and inspections of the battery system are recommended to prevent issues like code P0B5B. Follow the manufacturer's guidelines for service intervals or consult a professional for guidance.

10. Will driving habits or environmental conditions affect the likelihood of encountering the OBDII code P0B5B in a Chevrolet hybrid/electric vehicle?

- Driving habits and environmental conditions can impact the battery system's performance over time, potentially leading to issues like code P0B5B. It's essential to drive the vehicle as recommended and avoid extreme temperature conditions when possible.