AutoCodes – Generic – P1B24

P1B24 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 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 975

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 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 - Hybrid/Electric Vehicle Battery 31 Circuit High Voltage - AutoCodes.com — P1B24 Code - Hybrid/Electric Vehicle Battery 31 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B24?

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

How to Fix the DTC P1B24?

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 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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Need Help with the Code?

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Information for Specific Makes

P1B24 Buick — Hybrid/Electric Vehicle Battery 31 Circuit High Voltage
P1B24 Cadillac — Hybrid/Electric Vehicle Battery 31 Circuit High Voltage
P1B24 Chevrolet — Hybrid/Electric Vehicle Battery 31 Circuit High Voltage
P1B24 GMC — Hybrid/Electric Vehicle Battery 31 Circuit High Voltage
P1B24 Saturn — Hybrid/Electric Vehicle Battery 31 Circuit High Voltage

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 Code

What does the OBDII code P1B24 mean?

The OBDII code P1B24 indicates a high voltage issue in the Hybrid/Electric Vehicle Battery 31 circuit, suggesting that the voltage is above the expected range.

What are the common symptoms of code P1B24?

Common symptoms include warning lights on the dashboard, reduced vehicle performance, and difficulty starting the vehicle, especially in hybrid or electric modes.

What could cause the P1B24 code to trigger?

The code can be triggered by a faulty battery pack, damaged wiring or connectors in the high-voltage circuit, or issues with the battery management system.

Can I drive my vehicle with the P1B24 code?

While it may be possible to drive your vehicle, it is not recommended as it can lead to further damage to the hybrid battery system and potentially compromise safety.

How can I diagnose the P1B24 code?

To diagnose the code, use an OBDII scanner to confirm the code, inspect the high-voltage wiring and connectors for damage, and check the battery pack's voltage levels and health.

What repairs are typically needed for code P1B24?

Repairs may include replacing damaged wiring or connectors, servicing or replacing the hybrid battery pack, or updating the battery management system software.

Is code P1B24 a serious issue?

Yes, code P1B24 is serious as it indicates a high voltage problem that can affect vehicle performance and safety. Prompt attention is recommended.

Can I reset the P1B24 code after making repairs?

Yes, you can reset the code using an OBDII scanner after completing the necessary repairs, but ensure that the underlying issue has been resolved to prevent it from reappearing.

How much does it typically cost to fix the issue related to P1B24?

Repair costs can vary widely depending on the specific problem, ranging from a few hundred dollars for wiring repairs to several thousand dollars for a battery replacement.