AutoCodes – Buick – P1BF8 Buick

P1BF8 Buick Code - Hybrid/Electric Vehicle Battery 92 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: P1BF8 Buick indicates Hybrid/Electric Vehicle Battery 92 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 763

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 P1BF8 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 P1BF8 Buick - Hybrid/Electric Vehicle Battery 92 Circuit High Voltage - AutoCodes.com — P1BF8 Buick Code - Hybrid/Electric Vehicle Battery 92 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF8 Buick?

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

How to Fix the DTC P1BF8 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 P1BF8 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 P1BF8 Buick Code

1. What does the OBDII code P1BF8 indicate in a Buick?

The P1BF8 code suggests that there is an issue with the Hybrid/Electric Vehicle Battery 92 Circuit, specifically indicating a high voltage condition in that circuit.

2. What are the common symptoms of code P1BF8 in a Buick?

Symptoms may include reduced vehicle performance, possible hybrid powertrain malfunction, the battery not charging properly, warning lights on the dashboard, and the vehicle entering a fail-safe or limp mode to prevent further damage.

3. What can cause the P1BF8 code to appear in a Buick?

This code can be triggered by several issues such as faulty battery modules, damaged wiring in the battery circuit, issues with the battery management system, or a malfunctioning hybrid control module.

4. How do I diagnose the P1BF8 code in a Buick?

Diagnosis should start with a visual inspection of the hybrid battery and associated wiring for any signs of damage or corrosion. Using a multimeter, check the voltage levels in the battery circuit to confirm they are within the specifications. A scan tool can also be used to monitor battery module performance and pinpoint the issue.

5. What are the steps to fix the P1BF8 code in a Buick?

Repairs might include replacing damaged battery modules, repairing or replacing any faulty wiring or connectors, and potentially recalibrating or replacing the battery management system or hybrid control module if they are found to be defective.

6. Is it safe to drive a Buick with the P1BF8 code?

Driving with this code is not recommended as it indicates a significant problem with the hybrid battery system, which could lead to reduced vehicle performance or a breakdown. It is advisable to address the issue promptly.

7. How much does it typically cost to repair the P1BF8 code in a Buick?

The cost can vary widely based on the root cause of the high voltage condition. For example, replacing battery modules can be quite expensive, potentially running into thousands of dollars, whereas repairing wiring might cost significantly less, depending on the extent of the damage.

8. Can a faulty hybrid/electric vehicle battery 92 circuit impact the overall lifespan of a Buick's hybrid system?

Yes, unresolved issues like those indicated by the P1BF8 code can lead to further damage in the hybrid system, potentially shortening its lifespan and leading to more expensive repairs down the line.

9. Could the P1BF8 code affect the fuel efficiency of a Buick?

Yes, any issues within the hybrid battery system, including those indicated by the P1BF8 code, can affect the vehicle's ability to efficiently use its hybrid system, potentially leading to decreased fuel efficiency.