AutoCodes – Buick – P1BFB Buick

P1BFB Buick Code - Hybrid/Electric Vehicle Battery 93 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: P1BFB Buick indicates Hybrid/Electric Vehicle Battery 93 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 818

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 P1BFB 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 P1BFB Buick - Hybrid/Electric Vehicle Battery 93 Circuit High Voltage - AutoCodes.com — P1BFB Buick Code - Hybrid/Electric Vehicle Battery 93 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BFB Buick?

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

How to Fix the DTC P1BFB 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 P1BFB 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 P1BFB Buick Code

1. What are the common symptoms of OBDII code P1BFB Buick Hybrid/Electric Vehicle Battery 93 Circuit High Voltage?

- Common symptoms include the check engine light coming on, reduced fuel efficiency, and potential issues with the hybrid/electric vehicle battery.

2. What are the possible causes of OBDII code P1BFB in a Buick Hybrid/Electric Vehicle?

- The code P1BFB can be triggered by issues such as a faulty high voltage battery pack, damaged wiring, or a malfunctioning battery management system.

3. How can I diagnose OBDII code P1BFB in my Buick Hybrid/Electric Vehicle?

- Diagnosis typically involves using a professional OBDII scanner to read the code, inspecting the high voltage battery components, and testing the circuitry for any faults.

4. Are there any safety precautions to consider when dealing with OBDII code P1BFB in a Hybrid/Electric Vehicle?

- Yes, it's crucial to follow manufacturer guidelines and safety procedures when working with high voltage systems to prevent potential electric shocks or injuries.

5. Can I continue driving my Buick with OBDII code P1BFB present?

- It is not recommended to continue driving with the code active, as it could lead to further damage to the hybrid/electric vehicle components.

6. How can I reset OBDII code P1BFB in my Buick Hybrid/Electric Vehicle?

- Resetting the code typically involves using an OBDII scanner to clear the error code after addressing the underlying issue causing the fault.

7. Is it possible to repair OBDII code P1BFB in a Buick Hybrid/Electric Vehicle without professional help?

- While some basic troubleshooting and repairs can be done by DIY enthusiasts, dealing with high voltage systems often requires specialized knowledge and equipment, so professional help is recommended.

8. What are some tips for preventing OBDII code P1BFB from recurring in my Buick Hybrid/Electric Vehicle?

- Regular maintenance of the high voltage battery system, checking for loose connections, and addressing any warning signs promptly can help prevent the code from recurring.

9. Can extreme weather conditions affect the likelihood of OBDII code P1BFB appearing in a Buick Hybrid/Electric Vehicle?

- Yes, extreme temperatures can impact the performance of the high voltage battery system and potentially trigger the code, so it's important to monitor the system in harsh conditions.

10. How much can I expect to pay for repairs related to OBDII code P1BFB in my Buick Hybrid/Electric Vehicle?

- The cost of repairs can vary depending on the specific issue causing the code, but it's advisable to budget for potential expenses related to high voltage components and system diagnostics.