AutoCodes – GMC – P0BB9 GMC

P0BB9 GMC Code - Hybrid/Electric Vehicle Battery 26 Circuit Performance

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: P0BB9 GMC indicates Hybrid/Electric Vehicle Battery 26 Circuit Performance.
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 1,158

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 P0BB9 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 P0BB9 GMC - Hybrid/Electric Vehicle Battery 26 Circuit Performance - AutoCodes.com — P0BB9 GMC Code - Hybrid/Electric Vehicle Battery 26 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0BB9 GMC?

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

How to Fix the DTC P0BB9 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 P0BB9 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 P0BB9 GMC Code

1. What are the common symptoms of OBDII code P0BB9 in a GMC hybrid/electric vehicle?

- Common symptoms include reduced hybrid/electric vehicle performance, decreased fuel efficiency, and potential issues with the battery system.

2. What could cause the OBDII code P0BB9 related to Hybrid/Electric Vehicle Battery 26 Circuit Performance in a GMC vehicle?

- The code may be triggered by issues such as a faulty battery pack, damaged wiring, poor connections, or problems with the battery monitoring system.

3. How serious is the P0BB9 OBDII code in a GMC hybrid/electric vehicle?

- This code indicates a problem with the hybrid/electric vehicle battery 26 circuit performance and should be addressed promptly to prevent further damage to the vehicle's electrical system.

4. Can I continue driving my GMC hybrid/electric vehicle with the P0BB9 code present?

- It is not recommended to continue driving the vehicle with the P0BB9 code active, as it could lead to more severe issues with the battery system and overall performance.

5. What are some DIY repair tips for addressing the OBDII code P0BB9 in a GMC hybrid/electric vehicle?

- DIY repair tips may include checking and cleaning battery connections, inspecting wiring for damage, and resetting the code using an OBDII scanner after addressing any visible issues.

6. How can I reset the OBDII code P0BB9 in my GMC hybrid/electric vehicle?

- You can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, it is crucial to address the underlying issue causing the code before resetting it.

7. Is the repair for the P0BB9 OBDII code in a GMC hybrid/electric vehicle typically expensive?

- The cost of repair for the P0BB9 code can vary depending on the specific issue causing it. Simple fixes like cleaning connections may be less expensive, while replacing a faulty battery pack could be more costly.

8. Should I take my GMC hybrid/electric vehicle to a dealership for repair of the P0BB9 code?

- It is recommended to take your vehicle to a reputable dealership or an experienced automotive technician familiar with hybrid/electric systems to accurately diagnose and repair the P0BB9 code.

9. How can regular maintenance help prevent the occurrence of OBDII code P0BB9 in a GMC hybrid/electric vehicle?

- Regular maintenance such as checking the battery system, ensuring proper connections, and monitoring the vehicle's performance can help prevent issues that may trigger the P0BB9 code.

10. Are there any recalls or technical service bulletins related to the OBDII code P0BB9 in GMC hybrid/electric vehicles?

- It is advisable to check with GMC or authorized service centers for any recalls or technical service bulletins related to the P0BB9 code to see if your vehicle is eligible for any related repairs or updates.