AutoCodes – Buick – P0B5C Buick

P0B5C Buick Code - Hybrid/Electric Vehicle Battery 7 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: P0B5C Buick indicates Hybrid/Electric Vehicle Battery 7 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 863

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B5C 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 P0B5C Buick - Hybrid/Electric Vehicle Battery 7 Circuit High Voltage - AutoCodes.com — P0B5C Buick Code - Hybrid/Electric Vehicle Battery 7 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B5C Buick?

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

How to Fix the DTC P0B5C 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 P0B5C 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 P0B5C Buick Code

1. What are the common symptoms of OBDII code P0B5C in a Buick Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and illuminated check engine light.

2. What are the possible causes of OBDII code P0B5C in a Buick Hybrid/Electric Vehicle?

- The code P0B5C typically indicates a high voltage issue in Hybrid/Electric Vehicle Battery 7 circuit, which could be caused by a faulty battery cell, damaged wiring, or issues with the battery management system.

3. How can I diagnose the issue related to OBDII code P0B5C in my Buick Hybrid/Electric Vehicle?

- Diagnosing the issue requires specialized diagnostic equipment to check the hybrid battery voltage levels, inspect wiring for damage, and perform a thorough system scan to identify the specific fault.

4. Is it safe to continue driving my Buick Hybrid/Electric Vehicle with OBDII code P0B5C present?

- It is not recommended to continue driving the vehicle with the code P0B5C, as it could lead to further damage to the hybrid system components and potentially pose a safety risk.

5. How can I repair OBDII code P0B5C in my Buick Hybrid/Electric Vehicle?

- Repairing the issue may involve replacing a faulty battery cell, repairing damaged wiring, or recalibrating the battery management system. It is recommended to consult a certified technician for proper diagnosis and repair.

6. Can I reset the OBDII code P0B5C in my Buick Hybrid/Electric Vehicle using a simple OBDII scanner?

- While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the fault code to prevent it from reoccurring.

7. Are there any maintenance tips to prevent OBDII code P0B5C from appearing in my Buick Hybrid/Electric Vehicle?

- Regularly inspecting and maintaining the hybrid battery system, following manufacturer's maintenance schedule, and avoiding extreme temperature conditions can help prevent issues leading to code P0B5C.

8. How long does it typically take to repair OBDII code P0B5C in a Buick Hybrid/Electric Vehicle?

- The repair time can vary depending on the specific cause of the code P0B5C, but it may take several hours to a day for diagnosis and repair by a qualified technician.

9. Can I drive my Buick Hybrid/Electric Vehicle to the repair shop if OBDII code P0B5C appears suddenly?

- It is best to avoid driving the vehicle if the code P0B5C appears suddenly to prevent further damage. Towing the vehicle to the repair shop is recommended.

10. Will ignoring OBDII code P0B5C in my Buick Hybrid/Electric Vehicle affect overall vehicle performance?

- Ignoring the code can lead to decreased hybrid system performance, reduced fuel efficiency, and potential damage to other components, impacting the overall performance of the vehicle.