AutoCodes – GMC – P0B3B GMC

P0B3B GMC Code - Hybrid/Electric Vehicle Battery 1 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: P0B3B GMC indicates Hybrid/Electric Vehicle Battery 1 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,111

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0B3B 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 P0B3B GMC - Hybrid/Electric Vehicle Battery 1 Circuit - AutoCodes.com — P0B3B GMC Code - Hybrid/Electric Vehicle Battery 1 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B3B GMC?

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

How to Fix the DTC P0B3B 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 P0B3B 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.

Need more information about the P0B3B GMC code?

Need more information on how to fix the P0B3B GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0B3B GMC code diagnosed by a professional: Find a repair shop in your area

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 P0B3B GMC Code

1. What are common symptoms of OBDII code P0B3B in a GMC hybrid/electric vehicle?

- Common symptoms may include reduced hybrid system performance, decreased fuel efficiency, and possibly a warning light on the dashboard.

2. What can cause the OBDII code P0B3B to trigger in a GMC hybrid/electric vehicle?

- This code is typically triggered by issues with Hybrid/Electric Vehicle Battery 1 Circuit, such as a malfunctioning battery cell, wiring problems, or a faulty battery management system.

3. How serious is the OBDII code P0B3B in a GMC hybrid/electric vehicle?

- This code should be addressed promptly to prevent further damage to the hybrid/electric vehicle system and to maintain optimal performance.

4. Can I continue driving my GMC hybrid/electric vehicle with the P0B3B code present?

- It is not recommended to drive the vehicle with this code present, as it can lead to reduced performance and potential safety concerns.

5. What is the typical repair process for resolving the OBDII code P0B3B in a GMC hybrid/electric vehicle?

- The repair process often involves diagnosing the specific cause of the code, which may require professional inspection and potentially replacing a faulty battery cell or addressing wiring issues.

6. Are there any DIY tips for troubleshooting the OBDII code P0B3B in a GMC hybrid/electric vehicle?

- DIY troubleshooting for this code is limited due to the complexity of hybrid/electric vehicle systems. It is best to consult with a qualified technician for an accurate diagnosis.

7. How can I prevent the OBDII code P0B3B from recurring in my GMC hybrid/electric vehicle?

- Regular maintenance of the hybrid/electric vehicle system, including checking the battery health and ensuring proper charging, can help prevent the recurrence of this code.

8. Is it safe to reset the OBDII code P0B3B in a GMC hybrid/electric vehicle using a diagnostic tool?

- While resetting the code may temporarily turn off the warning light, it is important to address the underlying issue causing the code to prevent further problems.

9. How much can I expect to pay for repairing the OBDII code P0B3B in a GMC hybrid/electric vehicle?

- Repair costs can vary depending on the specific issue causing the code, but it is advisable to budget for potential battery or system component replacements.

10. Can the OBDII code P0B3B in a GMC hybrid/electric vehicle be caused by external factors such as extreme temperatures?

- Extreme temperatures can impact the performance of hybrid/electric vehicle batteries, potentially contributing to issues that trigger the P0B3B code.