AutoCodes – Buick – P1BD9 Buick

P1BD9 Buick Code - Hybrid/Electric Vehicle Battery 82 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: P1BD9 Buick indicates Hybrid/Electric Vehicle Battery 82 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 954

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BD9 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 P1BD9 Buick - Hybrid/Electric Vehicle Battery 82 Circuit Low Voltage - AutoCodes.com — P1BD9 Buick Code - Hybrid/Electric Vehicle Battery 82 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BD9 Buick?

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

How to Fix the DTC P1BD9 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 P1BD9 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 P1BD9 Buick Code

1. What are the common symptoms of OBDII code P1BD9 in a Buick Hybrid/Electric Vehicle?

- Common symptoms include poor fuel efficiency, loss of power, and the vehicle may not start or may experience difficulty starting.

2. What can cause the Hybrid/Electric Vehicle Battery 82 Circuit Low Voltage code (P1BD9) in a Buick?

- Possible causes include a faulty battery, issues with the battery management system, or problems with the hybrid/electric vehicle's charging system.

3. How serious is the P1BD9 OBDII code in a Buick Hybrid/Electric Vehicle?

- The code indicates a low voltage issue in the hybrid/electric vehicle battery circuit, which can lead to performance issues. It is important to address this issue promptly to avoid further damage.

4. Can I continue driving my Buick with the P1BD9 code present?

- It is not recommended to continue driving with the P1BD9 code active, as it can lead to further damage to the hybrid/electric vehicle battery system and affect the vehicle's performance.

5. How can I diagnose and repair the P1BD9 code in my Buick Hybrid/Electric Vehicle?

- Diagnosing the issue may require specialized equipment to test the battery and charging system. Repairing the code may involve replacing a faulty battery or addressing issues with the battery management system.

6. Are there any DIY repair tips for fixing the Hybrid/Electric Vehicle Battery 82 Circuit Low Voltage code in a Buick?

- DIY repairs for this code may be challenging due to the complexity of hybrid/electric vehicle systems. It is recommended to consult a professional technician with experience in hybrid/electric vehicle repair.

7. How much does it cost to fix the P1BD9 code in a Buick Hybrid/Electric Vehicle?

- The cost of repairs for the P1BD9 code can vary depending on the underlying issue and the extent of the damage. It is advisable to get a diagnosis from a qualified technician to determine the exact cost.

8. Can a low voltage issue in the hybrid/electric vehicle battery circuit cause other problems in the Buick?

- Yes, a low voltage issue can lead to various other electrical and performance issues in the hybrid/electric vehicle, affecting its overall operation and efficiency.

9. Is it possible to prevent the recurrence of the P1BD9 code in my Buick Hybrid/Electric Vehicle?

- Regular maintenance of the hybrid/electric vehicle's battery system, including checking for proper voltage levels and charging system health, can help prevent the recurrence of the P1BD9 code.

10. How long does it typically take to repair the Hybrid/Electric Vehicle Battery 82 Circuit Low Voltage code in a Buick?

- The repair time for the P1BD9 code can vary depending on the specific issue and the availability of parts. It is recommended to consult with a technician for an accurate estimate of repair time.