AutoCodes – Buick – P1BF1 Buick

P1BF1 Buick Code - Hybrid/Electric Vehicle Battery 90 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: P1BF1 Buick indicates Hybrid/Electric Vehicle Battery 90 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 756

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1BF1 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 P1BF1 Buick - Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage - AutoCodes.com — P1BF1 Buick Code - Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF1 Buick?

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

How to Fix the DTC P1BF1 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 P1BF1 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.

Need more information about the P1BF1 Buick code?

Need more information on how to fix the P1BF1 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1BF1 Buick 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 P1BF1 Buick Code

1. What are the common symptoms of OBDII code P1BF1 in a Buick Hybrid/Electric Vehicle?

- Common symptoms include poor fuel efficiency, reduced power, and difficulty starting the vehicle.

2. What are the possible causes of the Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage code in a Buick?

- Possible causes include a weak or failing hybrid/electric vehicle battery, loose or corroded battery connections, or issues with the battery management system.

3. How can I diagnose the P1BF1 code in my Buick Hybrid/Electric Vehicle?

- Diagnose the code by checking the hybrid/electric vehicle battery voltage with a multimeter, inspecting the battery connections for tightness and corrosion, and scanning the vehicle for other related trouble codes.

4. Can driving with the P1BF1 code present cause further damage to my Buick?

- Driving with the code may cause further strain on the hybrid/electric vehicle battery and related components, potentially leading to more severe issues over time.

5. What are some repair tips for fixing the Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage code in a Buick?

- Repair tips include ensuring the battery connections are clean and secure, checking for any signs of physical damage to the battery, and consulting a professional for advanced diagnostics and repair.

6. Is it safe to continue driving my Buick with the P1BF1 code illuminated?

- It is not recommended to continue driving the vehicle with the code illuminated, as it can lead to further damage and potential safety hazards.

7. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage issue in a Buick?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to a few thousand dollars, especially if the hybrid/electric vehicle battery needs to be replaced.

8. Are there any preventive measures I can take to avoid the recurrence of the P1BF1 code in my Buick?

- Regularly inspecting and maintaining the hybrid/electric vehicle battery, keeping the connections clean and tight, and following the manufacturer's recommended service schedule can help prevent the recurrence of the code.

9. Will resetting the OBDII code on my Buick make the issue go away permanently?

- Simply resetting the code may temporarily turn off the warning light, but it will not fix the underlying issue causing the P1BF1 code to appear. Identifying and addressing the root cause is essential for a permanent solution.

10. Can a DIY enthusiast with basic automotive knowledge fix the P1BF1 code in a Buick, or should it be left to professionals?

- While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing the complex hybrid/electric system related to the code is best left to professionals with specialized training and equipment.