AutoCodes – Buick – P1BDF Buick

P1BDF Buick Code - Hybrid/Electric Vehicle Battery 84 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: P1BDF Buick indicates Hybrid/Electric Vehicle Battery 84 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 800

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 P1BDF 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 P1BDF Buick - Hybrid/Electric Vehicle Battery 84 Circuit Low Voltage - AutoCodes.com — P1BDF Buick Code - Hybrid/Electric Vehicle Battery 84 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BDF Buick?

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

How to Fix the DTC P1BDF 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 P1BDF 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 P1BDF Buick Code

1. What are the common symptoms of OBDII code P1BDF in a Buick Hybrid/Electric Vehicle?

- Common symptoms include reduced power, poor fuel efficiency, and difficulty starting the vehicle.

2. What are the possible causes of the Hybrid/Electric Vehicle Battery 84 Circuit Low Voltage code in a Buick?

- Possible causes include a faulty high-voltage battery pack, issues with battery cooling systems, or a problem with the battery management system.

3. How can I diagnose the P1BDF code in my Buick Hybrid/Electric Vehicle?

- Diagnosis typically involves using a scan tool to retrieve the code and examining the high-voltage battery system for any visible damage or abnormalities.

4. Can driving with the OBDII code P1BDF present cause further damage to my Buick Hybrid/Electric Vehicle?

- Continuing to drive with this code can potentially cause damage to the high-voltage battery system and may result in further performance issues.

5. What are some repair tips for addressing the Hybrid/Electric Vehicle Battery 84 Circuit Low Voltage code in a Buick?

- Repair tips may include checking and cleaning battery terminals, inspecting wiring connections, and testing the battery pack for proper voltage levels.

6. Is it safe to attempt DIY repairs for the P1BDF code in a Buick Hybrid/Electric Vehicle?

- Due to the high-voltage nature of the systems involved, it is recommended to seek professional assistance for diagnosing and repairing this code.

7. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 84 Circuit Low Voltage code in a Buick?

- Repair costs can vary depending on the specific issue, but expect expenses related to diagnostic time, parts replacement, and labor charges.

8. Can resetting the OBDII code P1BDF in my Buick Hybrid/Electric Vehicle make it go away permanently?

- Resetting the code without addressing the underlying issue will likely result in it reappearing once the vehicle's systems detect the fault again.

9. Are there any recalls or technical service bulletins related to the P1BDF code in Buick Hybrid/Electric Vehicles?

- It's advisable to check with Buick dealerships or online resources to see if there are any relevant recalls or service bulletins for this specific OBDII code.

10. How important is it to address the Hybrid/Electric Vehicle Battery 84 Circuit Low Voltage code promptly in a Buick?

- It's crucial to address this code promptly to prevent further damage to the high-voltage battery system and ensure the vehicle operates safely and efficiently.