AutoCodes – GMC – P1BBB GMC

P1BBB GMC Code - Hybrid/Electric Vehicle Battery 72 Circuit Low 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: P1BBB GMC indicates Hybrid/Electric Vehicle Battery 72 Circuit Low 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.

Save to My Repairs My Repairs

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

Code Popularity 946

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 P1BBB 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 P1BBB GMC - Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage - AutoCodes.com — P1BBB GMC Code - Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BBB GMC?

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

How to Fix the DTC P1BBB 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 P1BBB 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 P1BBB GMC code?

Need more information on how to fix the P1BBB GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1BBB 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 P1BBB GMC Code

1. What are the common symptoms of OBDII code P1BBB GMC related to Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage?

- Common symptoms include poor vehicle performance, reduced fuel efficiency, and potential issues with the hybrid or electric drive system.

2. What are the possible causes of OBDII code P1BBB GMC indicating Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage?

- The code may be triggered by a weak or failing hybrid/electric vehicle battery, damaged battery cells, faulty battery management system, or issues with the charging system.

3. How can I diagnose the Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage issue associated with OBDII code P1BBB GMC?

- Diagnosis typically involves using a diagnostic scan tool to retrieve the code, inspecting the hybrid/electric vehicle battery for any visible damage, and checking the battery voltage levels under load.

4. What are some repair tips for addressing OBDII code P1BBB GMC related to Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage?

- Repair tips may include replacing the hybrid/electric vehicle battery, repairing damaged battery cells, recalibrating the battery management system, or addressing any issues with the charging system.

5. Is it safe to continue driving with OBDII code P1BBB GMC indicating Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage?

- It is not recommended to continue driving with this code as it can lead to further damage to the hybrid/electric vehicle system and potentially affect the overall drivability and safety of the vehicle.

6. Can a DIY enthusiast fix the Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage issue associated with OBDII code P1BBB GMC?

- While some basic diagnosis and inspection can be done by a knowledgeable individual, repairing or replacing components related to the hybrid/electric vehicle system may require specialized tools and expertise best handled by a professional mechanic.

7. How much does it typically cost to repair OBDII code P1BBB GMC related to Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage?

- The cost of repair can vary depending on the extent of the issue, the specific component that needs attention, and labor rates in your area. It is best to consult with a mechanic for an accurate estimate.

8. Can a weak or failing 12-volt battery cause OBDII code P1BBB GMC with Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage?

- Yes, a weak or failing 12-volt battery can sometimes trigger this code as it may affect the overall performance and charging of the hybrid/electric vehicle battery system.

9. Are there any recalls or technical service bulletins related to OBDII code P1BBB GMC associated with Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage?

- It is advisable to check with the manufacturer or a certified dealership to inquire about any recalls or technical service bulletins specifically related to this code and the hybrid/electric vehicle battery system.

10. How often should the hybrid/electric vehicle battery be inspected to prevent issues like OBDII code P1BBB GMC related to Hybrid/Electric Vehicle Battery 72 Circuit Low Voltage?

- It is recommended to have the hybrid/electric vehicle battery inspected as part of regular maintenance intervals or whenever you notice any symptoms of battery-related issues to prevent more severe problems down the line.