AutoCodes – Buick – P1B1B Buick

P1B1B Buick Code - Hybrid/Electric Vehicle Battery 28 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: P1B1B Buick indicates Hybrid/Electric Vehicle Battery 28 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 919

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 P1B1B 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 P1B1B Buick - Hybrid/Electric Vehicle Battery 28 Circuit High Voltage - AutoCodes.com — P1B1B Buick Code - Hybrid/Electric Vehicle Battery 28 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B1B Buick?

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

How to Fix the DTC P1B1B 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 P1B1B 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 P1B1B Buick Code

1. What are common symptoms of OBDII code P1B1B in a Buick Hybrid/Electric Vehicle?

- Common symptoms include the check engine light illuminating, reduced hybrid/electric vehicle performance, and potential issues with battery charging.

2. What does the OBDII code P1B1B for Hybrid/Electric Vehicle Battery 28 Circuit High Voltage in a Buick signify?

- This code indicates a high voltage condition in the circuit related to the hybrid/electric vehicle battery number 28.

3. What are possible causes of OBDII code P1B1B in a Buick Hybrid/Electric Vehicle?

- Possible causes include damaged wiring in the battery circuit, a faulty battery pack, issues with battery cooling systems, or a malfunctioning battery management system.

4. How can I diagnose the OBDII code P1B1B in my Buick Hybrid/Electric Vehicle?

- Diagnosis typically involves using a professional OBDII scanner to read the code, inspecting the battery circuit wiring, and testing the battery pack and related components for faults.

5. Can I continue driving my Buick Hybrid/Electric Vehicle with the P1B1B code present?

- It's not recommended to drive the vehicle with this code present, as it can lead to further damage to the battery system or affect the vehicle's performance.

6. How should I repair OBDII code P1B1B in my Buick Hybrid/Electric Vehicle?

- Repairing this code may involve fixing or replacing damaged wiring, addressing issues with the battery pack, ensuring proper cooling system function, or recalibrating the battery management system.

7. Is it possible to reset the OBDII code P1B1B in a Buick Hybrid/Electric Vehicle without repairs?

- While clearing the code may temporarily turn off the check engine light, it's crucial to address the underlying issue causing the code to prevent potential long-term damage.

8. Can a DIY enthusiast fix the OBDII code P1B1B in a Buick Hybrid/Electric Vehicle?

- Some basic diagnostic steps can be performed by DIY enthusiasts, but due to the complexity of hybrid/electric vehicle systems, it's recommended to seek professional help for proper repair and safety.

9. What are the potential risks of ignoring OBDII code P1B1B in a Buick Hybrid/Electric Vehicle?

- Ignoring this code can lead to battery system malfunctions, reduced vehicle efficiency, and safety hazards due to high voltage issues, posing risks to both the vehicle and occupants.

10. How can regular maintenance help prevent OBDII code P1B1B from occurring in a Buick Hybrid/Electric Vehicle?

- Regular maintenance, including checking the battery system, cooling components, and wiring for any signs of wear or damage, can help prevent issues that trigger the P1B1B code.