AutoCodes – Buick – P0B7C Buick

P0B7C Buick Code - Hybrid/Electric Vehicle Battery 14 Circuit

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: P0B7C Buick indicates Hybrid/Electric Vehicle Battery 14 Circuit.
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 765

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 P0B7C 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 P0B7C Buick - Hybrid/Electric Vehicle Battery 14 Circuit - AutoCodes.com — P0B7C Buick Code - Hybrid/Electric Vehicle Battery 14 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B7C Buick?

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

How to Fix the DTC P0B7C 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 P0B7C 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 P0B7C Buick Code

1. What does OBDII code P0B7C for Buick Hybrid/Electric Vehicle Battery 14 Circuit indicate?

- This code signals an issue with the 14th circuit of the hybrid/electric vehicle battery in your Buick.

2. What are common symptoms of OBDII code P0B7C in a Buick hybrid/electric vehicle?

- Common symptoms include poor fuel efficiency, reduced electric range, and potential battery charging problems.

3. What are possible causes of OBDII code P0B7C in a Buick hybrid/electric vehicle?

- Causes can range from a faulty battery module to issues with the battery management system or wiring harness.

4. How can I diagnose the OBDII code P0B7C in my Buick hybrid/electric vehicle?

- Diagnosing this code typically involves using a diagnostic scanner to pinpoint the exact circuit or component causing the issue.

5. Can I repair OBDII code P0B7C in my Buick hybrid/electric vehicle myself?

- While basic troubleshooting like checking connections and fuses can be done, complex repairs involving the battery system should be handled by a professional.

6. Are there any safety precautions to consider when dealing with OBDII code P0B7C in a Buick hybrid/electric vehicle?

- Yes, always follow manufacturer guidelines and disconnect the high-voltage system properly to avoid any risks of electric shock.

7. How important is it to address OBDII code P0B7C promptly in a Buick hybrid/electric vehicle?

- It is crucial to address this code promptly to prevent further damage to the battery system and ensure optimal vehicle performance.

8. Can resetting the OBDII code P0B7C in my Buick hybrid/electric vehicle make the problem disappear?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the fault.

9. Is it okay to continue driving my Buick with the OBDII code P0B7C present?

- It is not recommended to drive your Buick with this code present, as it can lead to more severe problems with the hybrid/electric system.

10. How much does it typically cost to repair OBDII code P0B7C in a Buick hybrid/electric vehicle?

- Repair costs can vary depending on the exact cause of the issue, but expect expenses related to parts replacement and labor for a professional repair.