AutoCodes – Buick – P0B7E Buick

P0B7E Buick Code - Hybrid/Electric Vehicle Battery 14 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: P0B7E Buick indicates Hybrid/Electric Vehicle Battery 14 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 883

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B7E Buick 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 P0B7E Buick - Hybrid/Electric Vehicle Battery 14 Circuit Low Voltage - AutoCodes.com — P0B7E Buick Code - Hybrid/Electric Vehicle Battery 14 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0B7E Buick?

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

How to Fix the DTC P0B7E Buick?

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 P0B7E Buick 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 P0B7E Buick Code

1. What are the common symptoms of OBDII code P0B7E in a Buick Hybrid/Electric Vehicle?

- Common symptoms include reduced fuel efficiency, loss of power, difficulty starting the vehicle, and illumination of the check engine light.

2. What could be causing the Hybrid/Electric Vehicle Battery 14 Circuit Low Voltage code in a Buick?

- Possible causes may include a failing hybrid/electric vehicle battery, damaged battery wiring, a faulty battery control module, or issues with the charging system.

3. How can I diagnose the P0B7E code in my Buick Hybrid/Electric Vehicle?

- Diagnosis typically involves using a scan tool to read the code, checking the condition of the hybrid/electric vehicle battery, inspecting battery wiring for damage, and testing the battery control module.

4. Can I continue driving my Buick with the P0B7E code present?

- It is not recommended to drive the vehicle with the code active, as it can lead to further damage to the hybrid/electric vehicle system. It is best to address the issue promptly.

5. What are some repair tips for resolving the Hybrid/Electric Vehicle Battery 14 Circuit Low Voltage code?

- Repair tips may include replacing the hybrid/electric vehicle battery if it is faulty, repairing or replacing damaged wiring, resetting the battery control module, and ensuring the charging system is functioning properly.

6. Is it safe to attempt DIY repairs for the P0B7E code in a Buick Hybrid/Electric Vehicle?

- Due to the complex nature of hybrid/electric vehicle systems, it is recommended to seek professional help for diagnosing and repairing the P0B7E code to ensure safety and proper functioning of the vehicle.

7. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 14 Circuit Low Voltage issue in a Buick?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve expenses for battery replacement, wiring repairs, and labor costs for diagnosis and repair.

8. Will resetting the OBDII code P0B7E in my Buick clear the issue permanently?

- Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the P0B7E code is not addressed, the code is likely to reappear.

9. Can extreme weather conditions affect the occurrence of the P0B7E code in a Buick Hybrid/Electric Vehicle?

- Yes, extreme temperatures can impact the performance of the hybrid/electric vehicle battery and potentially trigger the P0B7E code. It is important to monitor the battery in varying weather conditions.

10. How frequently should I have the hybrid/electric vehicle battery system checked to prevent the P0B7E code in my Buick?

- It is advisable to have the hybrid/electric vehicle battery system inspected regularly as part of routine maintenance to detect any potential issues early on and prevent the occurrence of the P0B7E code.