AutoCodes – Buick – P1BF0 Buick

P1BF0 Buick Code - Hybrid/Electric Vehicle Battery 90 Circuit Performance

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: P1BF0 Buick indicates Hybrid/Electric Vehicle Battery 90 Circuit Performance.
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 927

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BF0 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 P1BF0 Buick - Hybrid/Electric Vehicle Battery 90 Circuit Performance - AutoCodes.com — P1BF0 Buick Code - Hybrid/Electric Vehicle Battery 90 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BF0 Buick?

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

How to Fix the DTC P1BF0 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 P1BF0 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 P1BF0 Buick Code

1. What are common symptoms of OBDII code P1BF0 in a Buick Hybrid/Electric vehicle?

- Common symptoms may include decreased hybrid system performance, reduced fuel efficiency, and potential inability to start the vehicle.

2. What does the OBDII code P1BF0 in a Buick Hybrid/Electric vehicle indicate?

- This code specifically refers to Hybrid/Electric Vehicle Battery 90 Circuit Performance, signaling issues with the 90th battery circuit within the hybrid system.

3. What are possible causes of OBDII code P1BF0 in a Buick Hybrid/Electric vehicle?

- Potential causes may include faulty battery cells, damaged wiring or connectors in the 90th circuit, or issues with the battery management system.

4. How can I diagnose the OBDII code P1BF0 in my Buick Hybrid/Electric vehicle?

- Diagnosis typically involves using a scan tool to read the code, checking the 90th battery circuit for continuity, inspecting battery connections, and testing individual battery cells.

5. Is it safe to drive my Buick Hybrid/Electric vehicle with the OBDII code P1BF0 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid system and potentially unsafe driving conditions.

6. Can I reset the OBDII code P1BF0 in my Buick Hybrid/Electric vehicle myself?

- While you can clear the code using a scan tool, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. How can I repair OBDII code P1BF0 in my Buick Hybrid/Electric vehicle?

- Repair may involve replacing faulty battery cells, repairing damaged wiring or connectors, or recalibrating the battery management system to ensure proper functionality.

8. Are there any maintenance tips to prevent OBDII code P1BF0 from occurring in my Buick Hybrid/Electric vehicle?

- Regularly inspecting and maintaining the hybrid system components, keeping the battery charged within recommended levels, and addressing any warning signs promptly can help prevent this code.

9. Can I drive my Buick Hybrid/Electric vehicle in gasoline mode if the OBDII code P1BF0 triggers?

- If safe to do so, you may drive the vehicle in gasoline mode temporarily, but it is advisable to address the code and restore hybrid functionality as soon as possible.

10. How long does it typically take to repair OBDII code P1BF0 in a Buick Hybrid/Electric vehicle?

- Repair time can vary based on the specific issue causing the code, but it is recommended to consult a qualified technician for an accurate diagnosis and repair timeline.