AutoCodes – GMC – P1BD9 GMC

P1BD9 GMC 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 GMC 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 967

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 GMC 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 GMC - Hybrid/Electric Vehicle Battery 82 Circuit Low Voltage - AutoCodes.com — P1BD9 GMC Code - Hybrid/Electric Vehicle Battery 82 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BD9 GMC?

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

How to Fix the DTC P1BD9 GMC?

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 GMC 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 GMC Code

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

- Common symptoms include decreased power efficiency, reduced battery performance, and potential warning lights on the dashboard.

2. What does the OBDII code P1BD9 GMC indicate about the Hybrid/Electric Vehicle Battery 82 Circuit?

- The code indicates a low voltage issue specifically related to the Hybrid/Electric Vehicle Battery 82 Circuit.

3. What are possible causes of the P1BD9 code in a GMC Hybrid/Electric Vehicle?

- Possible causes include a faulty battery module, issues with the battery management system, poor electrical connections, or a failing hybrid/electric vehicle battery.

4. How can I diagnose the OBDII code P1BD9 in my GMC Hybrid/Electric Vehicle?

- Diagnosis typically involves using a scan tool to read the code, inspecting the battery connections and modules, and performing voltage tests on the battery.

5. Is it safe to continue driving with the OBDII code P1BD9 in a GMC Hybrid/Electric Vehicle?

- It is not recommended to continue driving with this code as it can lead to further damage to the hybrid/electric vehicle battery and potentially affect vehicle performance.

6. Can I reset the OBDII code P1BD9 in my GMC Hybrid/Electric Vehicle myself?

- While you can clear the code with a scan tool, it is important to address the underlying issue causing the code to prevent it from returning.

7. What are some repair tips for fixing the OBDII code P1BD9 in a GMC Hybrid/Electric Vehicle?

- Repair tips may include checking and cleaning battery connections, testing and replacing faulty battery modules, and ensuring proper functioning of the battery management system.

8. How much does it typically cost to repair the OBDII code P1BD9 in a GMC Hybrid/Electric Vehicle?

- Repair costs can vary depending on the extent of the issue, but it may involve expenses related to battery module replacement, diagnostic testing, and labor.

9. Can a DIY enthusiast fix the OBDII code P1BD9 in a GMC Hybrid/Electric Vehicle?

- While some basic inspections and maintenance tasks can be done by a DIY enthusiast, diagnosing and repairing complex electrical issues related to the hybrid/electric vehicle battery may require professional expertise.

10. How often should I have the hybrid/electric vehicle battery system inspected to prevent the OBDII code P1BD9 from appearing?

- Regular maintenance checks, as recommended by the manufacturer, can help prevent issues leading to the OBDII code P1BD9. It is advisable to follow the maintenance schedule provided in the owner's manual.