AutoCodes – Buick – P0B54 Buick

P0B54 Buick Code - Hybrid/Electric Vehicle Battery 6 Circuit

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: P0B54 Buick indicates Hybrid/Electric Vehicle Battery 6 Circuit.
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 927

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 P0B54 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 P0B54 Buick - Hybrid/Electric Vehicle Battery 6 Circuit - AutoCodes.com — P0B54 Buick Code - Hybrid/Electric Vehicle Battery 6 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B54 Buick?

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

How to Fix the DTC P0B54 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 P0B54 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 P0B54 Buick Code

1. What does the OBDII code P0B54 mean on a Buick?

P0B54 indicates an issue with the Hybrid/Electric Vehicle Battery 6 Circuit, specifically a fault or irregularity in the voltage or performance of Battery Block 6.

2. What are common symptoms of the P0B54 code in a Buick?

Symptoms may include the check engine light or hybrid system warning light turning on, reduced fuel efficiency, decreased hybrid system performance, or the vehicle entering limp mode.

3. What causes the P0B54 code to trigger in a Buick?

Common causes include a faulty battery module, corroded or loose connections, damaged wiring in the battery circuit, or a failing battery control module.

4. Can a weak 12V battery cause the P0B54 code in a Buick hybrid?

While less common, a weak or failing 12V battery can sometimes contribute to hybrid system issues, but the code typically points to a fault within the high-voltage battery system.

5. How do you diagnose the P0B54 code in a Buick?

Diagnosis involves using a scan tool to access freeze frame data, visually inspecting the battery wiring and connections, testing Battery Block 6 for voltage irregularities, and possibly performing a battery health check.

6. Can you drive with the P0B54 code on a Buick hybrid?

Driving is not recommended as it may lead to reduced performance, potential damage to the hybrid battery system, or the vehicle entering limp mode.

7. How do you fix the P0B54 code on a Buick?

Fixes may include repairing or replacing damaged wiring, cleaning corroded connections, replacing the faulty battery module, or reprogramming/updating the battery control module.

8. Is the P0B54 code expensive to repair on a Buick?

Repair costs can vary widely, ranging from a simple wiring fix to the more expensive replacement of a hybrid battery module, which can cost several hundred to a few thousand dollars.

9. Can a P0B54 code reoccur after being fixed?

Yes, the code can return if the root cause, such as a failing battery module or poor electrical connection, is not fully resolved.

10. Do I need to replace the entire battery pack for a P0B54 code?

Not always. In many cases, only the faulty battery module within the pack needs replacing, but this depends on the extent of the issue and the vehicleâ€™s design.