AutoCodes – Buick – P1B24 Buick

P1B24 Buick Code - Hybrid/Electric Vehicle Battery 31 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: P1B24 Buick indicates Hybrid/Electric Vehicle Battery 31 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 815

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B24 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 P1B24 Buick - Hybrid/Electric Vehicle Battery 31 Circuit High Voltage - AutoCodes.com — P1B24 Buick Code - Hybrid/Electric Vehicle Battery 31 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B24 Buick?

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

How to Fix the DTC P1B24 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 P1B24 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 P1B24 Buick Code

What does the OBDII code P1B24 mean for a Buick vehicle?

Code P1B24 indicates a high voltage issue in the Hybrid/Electric Vehicle Battery 31 Circuit, which is part of the vehicle's hybrid or electric powertrain system.

What are the common symptoms of code P1B24?

Symptoms may include warning lights on the dashboard, reduced fuel efficiency, limited performance of the hybrid system, or even a loss of electric drive functionality.

What causes the P1B24 code to appear in a Buick?

The code can be triggered by issues such as a faulty battery module, damaged wiring or connectors in the battery circuit, or problems with the hybrid control module.

Can driving with code P1B24 damage my Buick?

Continuing to drive with this code may lead to further damage to the hybrid battery system or reduced performance. Itâ€™s best to address the issue promptly.

How is code P1B24 diagnosed?

Technicians use a diagnostic scanner to retrieve the code and then perform tests on the battery module, wiring, and related components to identify the specific issue.

Can code P1B24 be fixed without replacing the hybrid battery?

Yes, if the issue is caused by damaged wiring, connectors, or a minor circuit fault, repairs can often resolve the problem without replacing the battery.

What tools are needed to repair a P1B24 code?

Common tools include a diagnostic scanner, multimeter for electrical testing, and basic automotive tools for accessing the battery and circuit components.

How much does it cost to repair code P1B24 on a Buick?

Repair costs vary depending on the issue, ranging from $100 for minor wiring repairs to several thousand dollars if the hybrid battery needs replacement.

Is code P1B24 covered under warranty for Buick vehicles?

If your Buick is still under the manufacturerâ€™s hybrid system warranty, the repair might be covered. Check with your dealership for details.

Can a weak 12V battery cause the P1B24 code to appear?

A weak 12V battery is unlikely to directly cause this code, as it pertains to the high-voltage hybrid battery system, not the low-voltage auxiliary battery.