AutoCodes – GMC – P0B9F GMC

P0B9F GMC Code - Hybrid/Electric Vehicle Battery 21 Circuit

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: P0B9F GMC indicates Hybrid/Electric Vehicle Battery 21 Circuit.
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 856

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 P0B9F 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 P0B9F GMC - Hybrid/Electric Vehicle Battery 21 Circuit - AutoCodes.com — P0B9F GMC Code - Hybrid/Electric Vehicle Battery 21 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B9F GMC?

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

How to Fix the DTC P0B9F 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 P0B9F 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 P0B9F GMC Code

1. What does OBDII code P0B9F GMC indicate?

The code P0B9F for GMC specifically relates to the Hybrid/Electric Vehicle Battery 21 Circuit.

2. What are the common symptoms of OBDII code P0B9F GMC?

Common symptoms of code P0B9F may include issues with the hybrid or electric vehicle battery, such as decreased performance, reduced fuel efficiency, or difficulty starting the vehicle.

3. What are the possible causes of OBDII code P0B9F GMC?

Possible causes of code P0B9F can include a faulty battery pack, damaged wiring in the battery circuit, or issues with the battery management system.

4. How can I diagnose OBDII code P0B9F GMC?

Diagnosing code P0B9F typically involves using a diagnostic scanner to read the code, inspecting the battery pack and circuit wiring for any visible damage, and testing the battery system components for proper functioning.

5. Can I still drive my vehicle with OBDII code P0B9F GMC?

It is not recommended to drive your vehicle if you have OBDII code P0B9F, as it can lead to further damage to the battery system or affect the overall performance of your hybrid or electric vehicle.

6. How can I repair OBDII code P0B9F GMC?

Repairing code P0B9F may involve replacing a faulty battery pack, repairing damaged wiring in the battery circuit, or resetting the battery management system after addressing the underlying issue.

7. Is it safe to reset the OBDII code P0B9F GMC on my own?

While you can attempt to clear the code using a diagnostic scanner, it is important to address the root cause of the code to prevent it from reoccurring and potentially causing more severe issues with your hybrid or electric vehicle.

8. How much does it cost to repair OBDII code P0B9F GMC?

The cost of repairing code P0B9F can vary depending on the specific issue causing the code, the extent of the repairs needed, and whether any components need to be replaced. It is recommended to consult with a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code P0B9F GMC at home?

While some basic troubleshooting steps can be performed at home, diagnosing and repairing code P0B9F may require specialized tools and knowledge of hybrid or electric vehicle systems. It is advisable to seek professional help for complex repairs.

10. How often does OBDII code P0B9F GMC occur in GMC hybrid or electric vehicles?

The occurrence of code P0B9F in GMC hybrid or electric vehicles can vary depending on the model and age of the vehicle, as well as how well the battery system has been maintained. Regular maintenance and inspections can help prevent this code from appearing.