AutoCodes – Buick – P1BCF Buick

P1BCF Buick Code - Hybrid/Electric Vehicle Battery 79 Circuit Performance

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: P1BCF Buick indicates Hybrid/Electric Vehicle Battery 79 Circuit Performance.
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 766

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BCF 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 P1BCF Buick - Hybrid/Electric Vehicle Battery 79 Circuit Performance - AutoCodes.com — P1BCF Buick Code - Hybrid/Electric Vehicle Battery 79 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BCF Buick?

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

How to Fix the DTC P1BCF 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 P1BCF 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 P1BCF Buick Code

1. What does the OBDII code P1BCF mean for a Buick?

P1BCF indicates a performance issue with the Hybrid/Electric Vehicle Battery 79 Circuit, which relates to one of the battery modules or circuits in the hybrid or electric system.

2. What are the common symptoms of the P1BCF code in a Buick?

Symptoms may include illuminated check engine or hybrid system warning lights, reduced fuel efficiency, limited hybrid assist, or poor vehicle performance.

3. What causes the P1BCF code to appear?

Common causes include a faulty battery module, damaged wiring or connectors in the circuit, software issues in the battery control module, or a failing hybrid battery.

4. Can I drive my Buick with the P1BCF code active?

Driving with the P1BCF code is not recommended as it may lead to further damage to the hybrid system or reduced vehicle performance.

5. How do technicians diagnose the P1BCF code?

Technicians use a scan tool to confirm the code, then inspect the wiring, connectors, and battery module associated with Circuit 79 for faults or damage.

6. What repairs are typically needed to fix the P1BCF code?

Repairs may include replacing the affected battery module, repairing or replacing damaged wiring or connectors, or updating the battery control module software.

7. How much does it cost to fix a P1BCF code on a Buick?

Repair costs vary depending on the specific cause, but hybrid battery module replacements can range from $1,000 to $4,000, plus labor.

8. Can a software update resolve the P1BCF code?

In some cases, a software update for the battery control module may resolve the issue if it is related to incorrect data processing.

9. What tools are required to troubleshoot the P1BCF code?

A professional OBDII scan tool with hybrid system diagnostics capability and access to Buickâ€™s service manual for wiring diagrams are essential.

10. How can I prevent the P1BCF code from occurring again?

Regular maintenance, ensuring proper cooling of the battery system, and promptly addressing hybrid system warnings can help prevent this code from reoccurring.