AutoCodes – Buick – P1BC5 Buick

P1BC5 Buick Code - Hybrid/Electric Vehicle Battery 75 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: P1BC5 Buick indicates Hybrid/Electric Vehicle Battery 75 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 733

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 P1BC5 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 P1BC5 Buick - Hybrid/Electric Vehicle Battery 75 Circuit High Voltage - AutoCodes.com — P1BC5 Buick Code - Hybrid/Electric Vehicle Battery 75 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC5 Buick?

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

How to Fix the DTC P1BC5 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 P1BC5 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 P1BC5 Buick Code

1. What are the common symptoms of OBDII code P1BC5 in a Buick Hybrid/Electric Vehicle?

- Common symptoms include the check engine light illuminating, reduced fuel efficiency, and potential issues with the vehicle's hybrid/electric system.

2. What does the OBDII code P1BC5 in a Buick Hybrid/Electric Vehicle indicate?

- This code indicates a high voltage condition in the Hybrid/Electric Vehicle Battery 75 Circuit.

3. What are some possible causes of OBDII code P1BC5 in a Buick Hybrid/Electric Vehicle?

- Possible causes include a faulty battery management system, damaged wiring or connectors, issues with the high voltage battery, or a malfunctioning hybrid/electric system component.

4. How can I diagnose the OBDII code P1BC5 in my Buick Hybrid/Electric Vehicle?

- Diagnosis typically involves using a scan tool to retrieve the specific fault code, inspecting the high voltage battery system for any visible damage, and testing the battery management system and related components.

5. Is it safe to continue driving my Buick Hybrid/Electric Vehicle with OBDII code P1BC5 present?

- It is not recommended to drive the vehicle with this code present as it can lead to further damage to the hybrid/electric system and potentially pose a safety risk.

6. Can I repair OBDII code P1BC5 in my Buick Hybrid/Electric Vehicle myself?

- Repairing this code may require specialized knowledge and tools due to the high voltage nature of the system. It is recommended to seek assistance from a qualified technician or dealership.

7. How much does it typically cost to repair OBDII code P1BC5 in a Buick Hybrid/Electric Vehicle?

- The cost of repair can vary depending on the underlying cause of the code and the extent of the damage. It is advisable to get a diagnostic inspection to determine the exact repair cost.

8. Are there any preventive maintenance tips to avoid OBDII code P1BC5 in a Buick Hybrid/Electric Vehicle?

- Regularly maintaining the high voltage battery system, following manufacturer's service recommendations, and addressing any warning signs promptly can help prevent this code from occurring.

9. Can OBDII code P1BC5 be intermittent in a Buick Hybrid/Electric Vehicle?

- Yes, intermittent issues with the high voltage system can trigger this code sporadically. It is important to address any recurring fault codes to prevent potential system failures.

10. How long does it typically take to repair OBDII code P1BC5 in a Buick Hybrid/Electric Vehicle?

- The repair time can vary depending on the specific cause of the code and the availability of parts. It is best to consult with a professional technician for an accurate estimate of the repair timeline.