AutoCodes – Buick – P1BB8 Buick

P1BB8 Buick Code - Hybrid/Electric Vehicle Battery 71 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: P1BB8 Buick indicates Hybrid/Electric Vehicle Battery 71 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.

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Code Popularity 798

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
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Code P1BB8 Buick 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 P1BB8 Buick - Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage - AutoCodes.com — P1BB8 Buick Code - Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BB8 Buick?

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

How to Fix the DTC P1BB8 Buick?

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 P1BB8 Buick 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 P1BB8 Buick Code

1. What are the common symptoms of OBDII code P1BB8 in a Buick hybrid/electric vehicle?

- Common symptoms include reduced hybrid system performance, poor fuel efficiency, and potential drivability issues.

2. What can cause the OBDII code P1BB8 indicating Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage in a Buick?

- The code P1BB8 can be triggered by issues such as a faulty battery cell, high resistance in the battery circuit, or problems with the battery management system.

3. How can I diagnose the OBDII code P1BB8 in my Buick hybrid/electric vehicle?

- Diagnosis typically involves using a professional OBDII scanner to read the code, checking the hybrid/electric vehicle battery system for any visible damage, and testing the battery cells and voltage.

4. Is it safe to continue driving my Buick with the OBDII code P1BB8 present?

- It is not recommended to continue driving the vehicle with the code P1BB8 active, as it can lead to further damage to the hybrid/electric vehicle battery system and potentially cause safety hazards.

5. Can I reset the OBDII code P1BB8 in my Buick hybrid/electric vehicle myself?

- While you can reset the code temporarily using an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

6. What are some repair tips for resolving the OBDII code P1BB8 in a Buick hybrid/electric vehicle?

- Repair tips may include checking and repairing any damaged wiring or connectors in the battery circuit, replacing faulty battery cells, or recalibrating the battery management system.

7. How much does it typically cost to repair the OBDII code P1BB8 in a Buick hybrid/electric vehicle?

- Repair costs can vary depending on the extent of the issue and the parts or components that need to be replaced. It is recommended to consult with a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast fix the OBDII code P1BB8 issue in a Buick hybrid/electric vehicle?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, resolving the complex issues related to the hybrid/electric vehicle battery system may require specialized knowledge and tools best handled by a professional mechanic.

9. How often does the OBDII code P1BB8 Buick Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage occur in vehicles?

- The occurrence of the OBDII code P1BB8 can vary depending on the vehicle's age, maintenance history, and driving conditions. Regular maintenance and monitoring of the hybrid/electric vehicle battery system can help prevent this code from appearing.

10. Are there any recalls or technical service bulletins related to the OBDII code P1BB8 in Buick hybrid/electric vehicles?

- It is advisable to check with Buick or authorized service centers for any recalls or technical service bulletins related to the OBDII code P1BB8 to ensure that the necessary repairs or updates are performed accordingly.