AutoCodes – GMC – P0BB1 GMC

P0BB1 GMC Code - Hybrid/Electric Vehicle Battery 24 Circuit High Voltage

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: P0BB1 GMC indicates Hybrid/Electric Vehicle Battery 24 Circuit High Voltage.
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 849

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 P0BB1 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 P0BB1 GMC - Hybrid/Electric Vehicle Battery 24 Circuit High Voltage - AutoCodes.com — P0BB1 GMC Code - Hybrid/Electric Vehicle Battery 24 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0BB1 GMC?

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

How to Fix the DTC P0BB1 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 P0BB1 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 P0BB1 GMC Code

1. What are the common symptoms of OBDII code P0BB1 in a GMC hybrid/electric vehicle?

- Common symptoms include the check engine light illuminating, reduced fuel efficiency, and the vehicle going into a reduced power mode.

2. What could cause the OBDII code P0BB1 to appear in a GMC hybrid/electric vehicle?

- The code P0BB1 typically indicates a high voltage issue in the 24 circuit of the hybrid/electric vehicle battery, which could be caused by a faulty battery pack, damaged wiring, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P0BB1 in my GMC hybrid/electric vehicle?

- Proper diagnosis requires specialized tools and knowledge. It is recommended to have the vehicle inspected by a qualified technician with experience in hybrid/electric vehicle systems.

4. Is it safe to continue driving my GMC hybrid/electric vehicle with the OBDII code P0BB1 present?

- It is not recommended to drive the vehicle with this code present, as it could lead to further damage to the high voltage system and pose safety risks. It is best to have the issue addressed promptly.

5. What are some repair tips for addressing the OBDII code P0BB1 in a GMC hybrid/electric vehicle?

- Repairing this code often involves diagnosing the specific cause of the high voltage issue, which may require replacing the battery pack, repairing damaged wiring, or recalibrating the battery management system.

6. Can I reset the OBDII code P0BB1 in my GMC hybrid/electric vehicle on my own?

- While you can clear the code using an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring. Clearing the code without fixing the problem may lead to further complications.

7. How much does it typically cost to repair the OBDII code P0BB1 in a GMC hybrid/electric vehicle?

- The cost of repair can vary depending on the specific cause of the high voltage issue. It is recommended to obtain a diagnosis from a qualified technician to determine the exact repair cost.

8. Are there any preventive maintenance measures to avoid OBDII code P0BB1 in a GMC hybrid/electric vehicle?

- Regular maintenance of the high voltage system, including checking the battery pack and monitoring the battery management system, can help prevent issues that may trigger the P0BB1 code.

9. Can a DIY enthusiast with hybrid/electric vehicle knowledge repair the OBDII code P0BB1 in a GMC vehicle?

- Repairing the P0BB1 code in a hybrid/electric vehicle requires specialized knowledge and tools. It is recommended to seek assistance from a professional technician with experience in hybrid/electric vehicle systems.

10. How long does it typically take to repair the OBDII code P0BB1 in a GMC hybrid/electric vehicle?

- The repair time can vary depending on the cause of the high voltage issue and the complexity of the repair. It is advisable to consult with a technician for an accurate estimate of the repair duration.