AutoCodes – GMC – P0BB8 GMC

P0BB8 GMC Code - Hybrid/Electric Vehicle Battery 26 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: P0BB8 GMC indicates Hybrid/Electric Vehicle Battery 26 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 957

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 P0BB8 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 P0BB8 GMC - Hybrid/Electric Vehicle Battery 26 Circuit - AutoCodes.com — P0BB8 GMC Code - Hybrid/Electric Vehicle Battery 26 Circuit

What does this mean?

What are the Possible Causes of the DTC P0BB8 GMC?

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

How to Fix the DTC P0BB8 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 P0BB8 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 P0BB8 GMC Code

1. What are common symptoms of OBDII code P0BB8 GMC related to the Hybrid/Electric Vehicle Battery 26 Circuit?

The common symptoms include poor hybrid system performance, decreased fuel efficiency, and potential difficulty starting the vehicle.

2. What are the possible causes of OBDII code P0BB8 GMC indicating an issue with the Hybrid/Electric Vehicle Battery 26 Circuit?

Possible causes include damaged wiring or connectors in the battery circuit, a faulty battery pack, or issues with the battery management system.

3. How can I diagnose the OBDII code P0BB8 GMC related to the Hybrid/Electric Vehicle Battery 26 Circuit?

Diagnosis typically involves using a scan tool to read the code, inspecting the battery circuit components for visible damage, and performing electrical tests to pinpoint the exact issue.

4. Can I still drive my vehicle with OBDII code P0BB8 GMC indicating a problem with the Hybrid/Electric Vehicle Battery 26 Circuit?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid system and potentially unsafe driving conditions.

5. What are some repair tips for addressing OBDII code P0BB8 GMC regarding the Hybrid/Electric Vehicle Battery 26 Circuit?

Repair tips may include checking and repairing damaged wiring, replacing faulty connectors, testing and potentially replacing the battery pack, or seeking assistance from a certified hybrid technician.

6. How urgent is it to address OBDII code P0BB8 GMC related to the Hybrid/Electric Vehicle Battery 26 Circuit?

It is important to address this code promptly to prevent further damage to the hybrid system and ensure the vehicle operates safely and efficiently.

7. Can resetting the OBDII code P0BB8 GMC related to the Hybrid/Electric Vehicle Battery 26 Circuit fix the issue?

Simply resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the code to appear.

8. Are there any specific maintenance practices to prevent OBDII code P0BB8 GMC from appearing in the Hybrid/Electric Vehicle Battery 26 Circuit?

Regularly inspecting the battery circuit components, following the manufacturer's maintenance schedule for the hybrid system, and avoiding overloading the vehicle can help prevent this issue.

9. Is it possible to fix OBDII code P0BB8 GMC indicating a problem with the Hybrid/Electric Vehicle Battery 26 Circuit without professional help?

While some basic inspections and repairs can be done by DIY enthusiasts, diagnosing and repairing complex hybrid system issues often require the expertise of a qualified technician.

10. How much does it typically cost to repair OBDII code P0BB8 GMC associated with the Hybrid/Electric Vehicle Battery 26 Circuit?

The cost of repair can vary depending on the specific underlying issue, the extent of damage, and the labor rates of the repair shop. It is advisable to obtain quotes from multiple sources before proceeding with the repair.