AutoCodes – GMC – P0B9D GMC

P0B9D GMC Code - Hybrid/Electric Vehicle Battery 20 Circuit High 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: P0B9D GMC indicates Hybrid/Electric Vehicle Battery 20 Circuit High 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 815

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 P0B9D 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 P0B9D GMC - Hybrid/Electric Vehicle Battery 20 Circuit High Voltage - AutoCodes.com — P0B9D GMC Code - Hybrid/Electric Vehicle Battery 20 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B9D GMC?

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

How to Fix the DTC P0B9D 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 P0B9D 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 P0B9D GMC Code

1. What are the common symptoms of OBDII code P0B9D in a GMC hybrid/electric vehicle?

When this code is present, you may experience issues such as reduced fuel efficiency, poor acceleration, or the vehicle going into a reduced power mode.

2. What does the OBDII code P0B9D in a GMC hybrid/electric vehicle indicate?

The code P0B9D specifically points to a problem with the Hybrid/Electric Vehicle Battery 20 Circuit High Voltage.

3. What are some possible causes of the OBDII code P0B9D in a GMC hybrid/electric vehicle?

Potential causes include a faulty high voltage battery pack, damaged wiring in the battery circuit, or issues with the battery management system.

4. How can I diagnose the OBDII code P0B9D in my GMC hybrid/electric vehicle?

Diagnosis typically involves using a scan tool to read the code, checking the high voltage battery system for any visible damage, and performing a battery voltage test.

5. Is it safe to continue driving my GMC hybrid/electric vehicle with the OBDII code P0B9D present?

It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the high voltage system and potentially unsafe driving conditions.

6. Can I reset the OBDII code P0B9D in my GMC hybrid/electric vehicle on my own?

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 reoccurring.

7. How much does it typically cost to repair the OBDII code P0B9D in a GMC hybrid/electric vehicle?

Repair costs can vary depending on the specific issue causing the code, but it is advisable to consult a professional technician for an accurate diagnosis and estimate.

8. Are there any preventive maintenance tips to avoid encountering the OBDII code P0B9D in a GMC hybrid/electric vehicle?

Regularly inspecting the high voltage battery system, ensuring proper cooling and ventilation, and following the manufacturer's maintenance schedule can help prevent issues leading to this code.

9. Can a DIY enthusiast with automotive knowledge repair the OBDII code P0B9D in a GMC hybrid/electric vehicle?

Due to the complexity and safety considerations of working with high voltage systems, it is recommended to seek assistance from a qualified technician or dealership for repairs related to this code.

10. How long does it take to repair the OBDII code P0B9D in a GMC hybrid/electric vehicle?

The repair time can vary based on the exact cause of the code and the availability of parts. It is best to consult with a professional technician for an estimate of the repair duration.