AutoCodes – GMC – P0B8B GMC

P0B8B GMC Code - Hybrid/Electric Vehicle Battery 17 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: P0B8B GMC indicates Hybrid/Electric Vehicle Battery 17 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 866

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 P0B8B 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 P0B8B GMC - Hybrid/Electric Vehicle Battery 17 Circuit - AutoCodes.com — P0B8B GMC Code - Hybrid/Electric Vehicle Battery 17 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B8B GMC?

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

How to Fix the DTC P0B8B 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 P0B8B 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 P0B8B GMC Code

1. What are common symptoms of OBDII code P0B8B in a GMC hybrid/electric vehicle?

- Common symptoms include the Check Engine light coming on, reduced hybrid system performance, and potential issues with starting the vehicle.

2. What does OBDII code P0B8B in a GMC hybrid/electric vehicle indicate?

- This code specifically refers to a problem with the Hybrid/Electric Vehicle Battery 17 Circuit, signaling issues with the battery system.

3. What are possible causes of OBDII code P0B8B in a GMC hybrid/electric vehicle?

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

4. How can I diagnose the source of OBDII code P0B8B in my GMC hybrid/electric vehicle?

- Diagnosis typically involves using a professional OBDII scanner to read the code, inspecting the battery and related components for visible damage, and performing voltage tests as needed.

5. Can I repair OBDII code P0B8B in my GMC hybrid/electric vehicle at home?

- While basic inspections and visual checks can be done at home, diagnosing and repairing issues related to the Hybrid/Electric Vehicle Battery 17 Circuit often require specialized tools and knowledge best handled by a professional technician.

6. Is it safe to continue driving my GMC hybrid/electric vehicle with OBDII code P0B8B present?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage to the hybrid system and potentially compromise safety.

7. How much does it typically cost to repair OBDII code P0B8B in a GMC hybrid/electric vehicle?

- Repair costs can vary depending on the exact cause of the issue, but they can range from a few hundred to a few thousand dollars, especially if the battery pack needs to be replaced.

8. Are there any preventive measures to avoid OBDII code P0B8B in a GMC hybrid/electric vehicle?

- Regular maintenance of the hybrid system, including checking the battery and related components, can help prevent issues that may trigger this code.

9. Can a DIY enthusiast with automotive experience attempt to fix OBDII code P0B8B in a GMC hybrid/electric vehicle?

- While some experienced DIY enthusiasts may have the skills to tackle certain aspects of the repair, working on the hybrid system and battery circuit is complex and should be left to professionals to ensure safety and proper functioning.

10. Will resetting the Check Engine light make OBDII code P0B8B disappear in my GMC hybrid/electric vehicle?

- Resetting the Check Engine light may temporarily turn it off, but if the underlying issue causing OBDII code P0B8B is not addressed, the light will likely come back on as the system detects the problem again.