AutoCodes – Buick – P1BF6 Buick

P1BF6 Buick Code - Hybrid/Electric Vehicle Battery 92 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: P1BF6 Buick indicates Hybrid/Electric Vehicle Battery 92 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 750

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 P1BF6 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 P1BF6 Buick - Hybrid/Electric Vehicle Battery 92 Circuit Performance - AutoCodes.com — P1BF6 Buick Code - Hybrid/Electric Vehicle Battery 92 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BF6 Buick?

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

How to Fix the DTC P1BF6 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 P1BF6 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 P1BF6 Buick Code

1. What does the OBDII code P1BF6 mean on a Buick?

P1BF6 indicates a "Hybrid/Electric Vehicle Battery 92 Circuit Performance" issue, meaning there is a problem with the performance of a specific battery circuit in the hybrid/electric vehicle system.

2. What are the common symptoms of code P1BF6 on a Buick?

Symptoms may include reduced fuel economy, limited electric driving range, the hybrid system not functioning properly, or the illumination of the check engine light or service hybrid system warning.

3. What causes the P1BF6 code to appear on a Buick?

Common causes include a malfunctioning battery cell, a wiring issue in the battery circuit, a faulty battery energy control module, or internal damage within the hybrid battery pack.

4. Can I still drive my Buick with the P1BF6 code?

While the vehicle may still be drivable, performance and efficiency may be reduced. Itâ€™s recommended to address the issue promptly to avoid further damage to the hybrid system.

5. How is the P1BF6 code diagnosed on a Buick?

Technicians use a scan tool to check for related codes, inspect the battery circuit wiring, test the hybrid battery cells, and evaluate the performance of the battery energy control module.

6. What repairs are commonly needed for the P1BF6 code?

Repairs may involve replacing a faulty battery cell, repairing damaged wiring, or replacing the battery energy control module if itâ€™s determined to be defective.

7. How much does it cost to fix the P1BF6 code on a Buick?

Repair costs vary depending on the specific issue but can range from a few hundred dollars for wiring repairs to several thousand dollars if the hybrid battery pack needs replacement.

8. Can a weak 12V auxiliary battery cause the P1BF6 code on a Buick?

While unlikely, a weak 12V auxiliary battery can sometimes contribute to hybrid system issues. Testing the 12V battery is a good first step to rule out related problems.

9. Do I need to replace the entire hybrid battery for the P1BF6 code?

Not always. Sometimes only individual battery cells or modules need replacement. A professional diagnosis can confirm the extent of the repair required.

10. How can I prevent the P1BF6 code from returning after repair?

Regular maintenance, avoiding extreme temperatures, and ensuring proper charging practices can help maintain the health of the hybrid battery system and prevent future issues.