AutoCodes – Buick – P1BCB Buick

P1BCB Buick Code - Hybrid/Electric Vehicle Battery 77 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: P1BCB Buick indicates Hybrid/Electric Vehicle Battery 77 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 793

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 P1BCB 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 P1BCB Buick - Hybrid/Electric Vehicle Battery 77 Circuit High Voltage - AutoCodes.com — P1BCB Buick Code - Hybrid/Electric Vehicle Battery 77 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BCB Buick?

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

How to Fix the DTC P1BCB 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 P1BCB 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 P1BCB Buick Code

1. What are the common symptoms of OBDII code P1BCB Buick related to Hybrid/Electric Vehicle Battery 77 Circuit High Voltage?

- Common symptoms include illuminated Check Engine light, reduced fuel efficiency, and potential issues with the hybrid/electric vehicle's battery performance.

2. What are the possible causes of OBDII code P1BCB Buick Hybrid/Electric Vehicle Battery 77 Circuit High Voltage?

- Possible causes include faulty hybrid/electric vehicle battery 77 circuit, damaged wiring or connectors, or issues with the battery management system.

3. How can I diagnose OBDII code P1BCB Buick Hybrid/Electric Vehicle Battery 77 Circuit High Voltage?

- Diagnosing this code typically involves using a professional OBDII scanner to retrieve the code, inspecting the hybrid/electric vehicle battery connections, and testing the battery 77 circuit for proper voltage.

4. Can I continue driving my vehicle with OBDII code P1BCB Buick Hybrid/Electric Vehicle Battery 77 Circuit High Voltage?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/electric vehicle system. It's best to have the issue diagnosed and repaired promptly.

5. How should I repair OBDII code P1BCB Buick Hybrid/Electric Vehicle Battery 77 Circuit High Voltage?

- Repairing this code may involve repairing or replacing damaged wiring, connectors, or components related to the hybrid/electric vehicle battery 77 circuit. It's recommended to consult a professional technician for accurate diagnosis and repair.

6. Is OBDII code P1BCB Buick related to Hybrid/Electric Vehicle Battery 77 Circuit High Voltage a common issue in Buick hybrid/electric vehicles?

- While not extremely common, this code can occur in Buick hybrid/electric vehicles due to various factors affecting the battery system. Regular maintenance and inspections can help prevent such issues.

7. Can a DIY enthusiast fix OBDII code P1BCB Buick Hybrid/Electric Vehicle Battery 77 Circuit High Voltage?

- While some basic inspections and checks can be done by a DIY enthusiast, repairing this code often requires specialized knowledge and equipment related to hybrid/electric vehicle systems. It's recommended to seek professional help for proper diagnosis and repair.

8. What are the potential risks of ignoring OBDII code P1BCB Buick Hybrid/Electric Vehicle Battery 77 Circuit High Voltage?

- Ignoring this code can lead to further damage to the hybrid/electric vehicle system, potentially resulting in more costly repairs or even safety hazards. It's important to address the issue promptly.

9. How long does it typically take to repair OBDII code P1BCB Buick Hybrid/Electric Vehicle Battery 77 Circuit High Voltage?

- The repair time for this code can vary depending on the exact cause of the issue and the complexity of the repair. It's best to consult with a professional technician for an accurate estimate of repair time.

10. Are there any preventive measures to avoid OBDII code P1BCB Buick Hybrid/Electric Vehicle Battery 77 Circuit High Voltage?

- Regular maintenance of the hybrid/electric vehicle system, including checking battery connections and monitoring battery performance, can help prevent issues that may trigger this code.