AutoCodes – Buick – P1BF7 Buick

P1BF7 Buick Code - Hybrid/Electric Vehicle Battery 92 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: P1BF7 Buick indicates Hybrid/Electric Vehicle Battery 92 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.

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Code Popularity 787

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 P1BF7 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 P1BF7 Buick - Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage - AutoCodes.com — P1BF7 Buick Code - Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF7 Buick?

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

How to Fix the DTC P1BF7 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 P1BF7 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 P1BF7 Buick Code

1. What does the OBDII code P1BF7 mean on a Buick?

The P1BF7 code indicates a "Hybrid/Electric Vehicle Battery 92 Circuit Low Voltage," meaning there is a low voltage issue detected in the battery cell or module associated with circuit 92.

2. What are the common symptoms of the P1BF7 code?

Symptoms may include reduced hybrid or electric drive performance, warning lights on the dashboard, limited battery charge capacity, or the vehicle entering limp mode.

3. What causes the P1BF7 code to appear in a Buick?

Possible causes include a faulty hybrid battery module, damaged wiring or connectors in the battery circuit, a defective battery management system, or a calibration issue.

4. Can I drive my Buick with the P1BF7 code?

It is not recommended to drive with this code active, as it could lead to further damage to the hybrid battery system or reduced vehicle performance.

5. How is the P1BF7 code diagnosed?

A mechanic will use a scan tool to confirm the code, inspect the hybrid battery module, check for damaged wiring or connectors, and test the battery management system for faults.

6. What are the repair options for a P1BF7 code on a Buick?

Repairs may include replacing the faulty battery module, repairing or replacing damaged wiring or connectors, or reprogramming the battery management system.

7. How much does it cost to fix the P1BF7 code on a Buick?

Repair costs can vary but may range from $500 to $4,000, depending on whether the issue involves minor wiring repairs or a full battery module replacement.

8. Can the P1BF7 code clear itself on a Buick?

The code is unlikely to clear itself without addressing the underlying issue, as it is related to a physical fault in the battery circuit.

9. Is the P1BF7 code covered under warranty for a Buick?

If your vehicle is under the hybrid or electric vehicle warranty, the repairs may be covered. Check with your dealership for specific warranty details.

10. How can I prevent the P1BF7 code from occurring again?

Regular maintenance of the hybrid battery system, ensuring proper connections, and addressing any warning signs early can help prevent this code from recurring.