AutoCodes – Buick – P1BF2 Buick

P1BF2 Buick Code - Hybrid/Electric Vehicle Battery 90 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: P1BF2 Buick indicates Hybrid/Electric Vehicle Battery 90 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 721

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 P1BF2 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 P1BF2 Buick - Hybrid/Electric Vehicle Battery 90 Circuit High Voltage - AutoCodes.com — P1BF2 Buick Code - Hybrid/Electric Vehicle Battery 90 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF2 Buick?

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

How to Fix the DTC P1BF2 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 P1BF2 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 P1BF2 Buick Code

1. What are the common symptoms of OBDII code P1BF2 in a Buick Hybrid/Electric Vehicle related to the High Voltage Battery 90 Circuit?

- Common symptoms include reduced hybrid system performance, check engine light illumination, and potentially a decrease in fuel efficiency.

2. What are some possible causes of OBDII code P1BF2 in a Buick Hybrid/Electric Vehicle indicating a High Voltage Battery 90 Circuit issue?

- Potential causes may include a faulty high voltage battery pack, damaged battery cables or connections, or issues with the hybrid system control module.

3. How can I diagnose the High Voltage Battery 90 Circuit issue causing OBDII code P1BF2 in my Buick Hybrid/Electric Vehicle?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault code, inspecting the high voltage battery components, and testing the battery voltage levels.

4. Are there any safety precautions to keep in mind when dealing with a High Voltage Battery 90 Circuit problem in a Buick Hybrid/Electric Vehicle?

- Yes, it is crucial to follow proper safety procedures when working with high voltage systems, including wearing insulated gloves and avoiding contact with exposed electrical components.

5. Can I continue driving my Buick Hybrid/Electric Vehicle with OBDII code P1BF2 indicating a High Voltage Battery 90 Circuit issue?

- It is not recommended to continue driving the vehicle with this code present, as it could lead to further damage to the high voltage system and potential safety hazards.

6. What are some repair tips for resolving OBDII code P1BF2 related to the High Voltage Battery 90 Circuit in a Buick Hybrid/Electric Vehicle?

- Repair tips may include checking and cleaning battery connections, replacing damaged cables, and consulting a professional technician for advanced diagnostics and repairs.

7. Is it possible to reset OBDII code P1BF2 in a Buick Hybrid/Electric Vehicle without addressing the underlying High Voltage Battery 90 Circuit issue?

- It is not recommended to simply clear the code without addressing the root cause, as the issue may persist and lead to more severe problems in the future.

8. How much does it typically cost to repair OBDII code P1BF2 related to the High Voltage Battery 90 Circuit in a Buick Hybrid/Electric Vehicle?

- Repair costs can vary depending on the extent of the issue, but it is advisable to budget for potential battery replacements or system repairs, which can be significant.

9. Can a DIY enthusiast with automotive experience fix the High Voltage Battery 90 Circuit issue causing OBDII code P1BF2 in a Buick Hybrid/Electric Vehicle?

- While some basic inspections and maintenance tasks can be performed by DIY enthusiasts, addressing high voltage battery issues typically requires specialized knowledge and tools best handled by professionals.

10. How can regular maintenance help prevent OBDII code P1BF2 occurrences related to the High Voltage Battery 90 Circuit in a Buick Hybrid/Electric Vehicle?

- Regular maintenance, such as checking and cleaning battery connections, monitoring hybrid system performance, and addressing any warning signs promptly, can help prevent issues leading to this fault code.