AutoCodes – GMC – P1B2B GMC

P1B2B GMC Code - Hybrid/Electric Vehicle Battery 30 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: P1B2B GMC indicates Hybrid/Electric Vehicle Battery 30 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 765

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 12, 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 P1B2B 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 P1B2B GMC - Hybrid/Electric Vehicle Battery 30 Circuit - AutoCodes.com — P1B2B GMC Code - Hybrid/Electric Vehicle Battery 30 Circuit

What does this mean?

What are the Possible Causes of the DTC P1B2B GMC?

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

How to Fix the DTC P1B2B 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 P1B2B 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 P1B2B GMC code?

Need more information on how to fix the P1B2B GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B2B 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 P1B2B GMC Code

1. What are the common symptoms of OBDII code P1B2B in a GMC Hybrid/Electric Vehicle?

- Common symptoms include reduced electric driving range, battery charging issues, and potential warning lights on the dashboard.

2. What can cause the OBDII code P1B2B related to the Hybrid/Electric Vehicle Battery 30 Circuit in a GMC vehicle?

- The code may be triggered by a fault in the battery management system, a malfunctioning battery cell, or issues with the electrical connections.

3. How can I diagnose the OBDII code P1B2B in my GMC Hybrid/Electric Vehicle?

- A thorough diagnostic scan using an OBDII scanner is necessary to pinpoint the exact cause of the code. Additionally, a visual inspection of the battery and related components may be required.

4. What are the potential risks of ignoring the OBDII code P1B2B in a GMC Hybrid/Electric Vehicle?

- Ignoring this code can lead to further damage to the vehicle's battery system, reduced performance, and potentially unsafe driving conditions.

5. Can I continue driving my GMC Hybrid/Electric Vehicle with the OBDII code P1B2B present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to more severe issues and potential safety hazards.

6. Are there any DIY repair tips for addressing the OBDII code P1B2B in a GMC Hybrid/Electric Vehicle?

- DIY repairs are not recommended for this code, as it involves the complex battery system of a hybrid/electric vehicle. It is best to seek professional assistance.

7. How much does it typically cost to repair the OBDII code P1B2B in a GMC Hybrid/Electric Vehicle?

- The cost of repairs can vary depending on the extent of the issue, but it is advisable to budget for potentially expensive repairs due to the complexity of hybrid/electric vehicle systems.

8. Is the OBDII code P1B2B specific to GMC vehicles, or can it occur in other hybrid/electric vehicles?

- While the specific code P1B2B may be unique to GMC vehicles, similar issues related to the Hybrid/Electric Vehicle Battery 30 Circuit can occur in other hybrid/electric vehicles as well.

9. How long does it typically take to repair the OBDII code P1B2B in a GMC Hybrid/Electric Vehicle?

- The repair time can vary depending on the exact cause of the code and the availability of parts. It is best to consult with a professional technician for a more accurate estimate.

10. Can a regular mechanic repair the OBDII code P1B2B in a GMC Hybrid/Electric Vehicle, or is specialized expertise required?

- Due to the specialized nature of hybrid/electric vehicle systems, it is recommended to seek out a mechanic or technician with expertise in these vehicles to properly address the code P1B2B.