AutoCodes – Buick – P1BC7 Buick

P1BC7 Buick Code - Hybrid/Electric Vehicle Battery 76 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: P1BC7 Buick indicates Hybrid/Electric Vehicle Battery 76 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 822

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BC7 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 P1BC7 Buick - Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage - AutoCodes.com — P1BC7 Buick Code - Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC7 Buick?

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

How to Fix the DTC P1BC7 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 P1BC7 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 P1BC7 Buick Code

1. What are the common symptoms of OBDII code P1BC7 in a Buick Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage?

The common symptoms include reduced power and efficiency, poor acceleration, warning lights on the dashboard, and potential issues with starting the vehicle.

2. What are the possible causes of the OBDII code P1BC7 in a Buick Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage?

Possible causes include a failing hybrid/electric vehicle battery, damaged wiring or connectors in the battery system, software glitches, or issues with the battery management system.

3. How can I diagnose the OBDII code P1BC7 in a Buick Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage?

Diagnosis typically involves using a scan tool to read the code, checking the battery voltage levels, inspecting the wiring and connectors for damage, and performing a battery system test as per manufacturer guidelines.

4. Can I continue to drive my Buick with the OBDII code P1BC7 present?

It is not recommended to continue driving the vehicle with this code as it can lead to further damage to the hybrid/electric system. It's best to have the issue diagnosed and repaired as soon as possible.

5. Are there any DIY repair tips for fixing the OBDII code P1BC7 in a Buick Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage?

DIY repair for this code is not recommended due to the complexity of the hybrid/electric system. It's best to have a qualified technician or dealership diagnose and repair the issue.

6. How much does it typically cost to repair the OBDII code P1BC7 in a Buick Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage?

The cost of repair can vary depending on the exact cause of the issue. It's advisable to get a diagnostic inspection done first to determine the specific repair needed and associated costs.

7. Can a faulty sensor trigger the OBDII code P1BC7 in a Buick Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage?

While a faulty sensor is not a common cause of this particular code, it's still possible. Proper diagnosis is crucial to pinpoint the exact issue and avoid unnecessary repairs.

8. How long does it usually take to repair the OBDII code P1BC7 in a Buick Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage?

The repair time can vary depending on the cause of the code and the availability of parts. Some repairs may be completed within a few hours, while others could take longer if extensive troubleshooting is required.

9. What steps can I take to prevent the OBDII code P1BC7 from recurring in my Buick Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage?

Regular maintenance of the hybrid/electric system, timely battery inspections, and addressing any warning signs promptly can help prevent this code from recurring in the future.

10. Is it safe to drive my Buick in limp mode if the OBDII code P1BC7 is triggered?

Driving in limp mode with this code may not be safe in the long run as it can lead to further damage to the vehicle. It's best to have the issue addressed by a professional to ensure the safety and performance of the vehicle.