AutoCodes – Chevrolet – P0B56 Chevrolet

P0B56 Chevrolet Code - Hybrid/Electric Vehicle Battery 6 Circuit Low 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: P0B56 Chevrolet indicates Hybrid/Electric Vehicle Battery 6 Circuit Low 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 876

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 P0B56 Chevrolet 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 P0B56 Chevrolet - Hybrid/Electric Vehicle Battery 6 Circuit Low Voltage - AutoCodes.com — P0B56 Chevrolet Code - Hybrid/Electric Vehicle Battery 6 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0B56 Chevrolet?

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

How to Fix the DTC P0B56 Chevrolet?

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 P0B56 Chevrolet 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 P0B56 Chevrolet Code

What does the OBDII code P0B56 mean on a Chevrolet?

The code P0B56 indicates a "Hybrid/Electric Vehicle Battery 6 Circuit Low Voltage," meaning there is a voltage issue in battery circuit 6 of the high-voltage battery system.

What are the common symptoms of code P0B56 in a Chevrolet?

Symptoms may include reduced hybrid or electric vehicle performance, warning lights on the dashboard, or difficulty starting the vehicle.

What causes the P0B56 code in a Chevrolet hybrid or electric vehicle?

Common causes include a faulty battery cell in circuit 6, damaged wiring or connectors, or issues with the hybrid battery control module.

Can I drive my Chevrolet with the P0B56 code?

Itâ€™s not recommended to drive the vehicle with this code, as it may impact performance and could lead to further damage to the hybrid battery system.

How do I diagnose the P0B56 code on my Chevrolet?

Diagnosis involves inspecting the high-voltage battery for damage, checking wiring and connectors in circuit 6, and testing the hybrid battery control module for proper operation.

What tools are needed to troubleshoot the P0B56 code?

Youâ€™ll need an OBDII scanner capable of reading hybrid-specific codes, a multimeter to test voltage, and possibly manufacturer-specific diagnostic tools.

How much does it cost to repair the P0B56 code in a Chevrolet?

Repair costs can vary widely, but replacing a damaged battery cell or repairing wiring can range from several hundred to a few thousand dollars, depending on the extent of the issue.

Can the P0B56 code be fixed without replacing the hybrid battery?

Yes, if the issue is caused by faulty wiring, connectors, or the hybrid battery control module, these components can often be repaired or replaced without replacing the entire battery.

What should I do if I see the P0B56 code in my Chevrolet?

You should take your vehicle to a qualified technician who specializes in hybrid or electric vehicles for a proper diagnosis and repair.

Is the P0B56 code common in Chevrolet hybrid or electric vehicles?

While not extremely common, this code can appear in vehicles with aging hybrid batteries or those with wiring issues in the battery circuits. Regular maintenance can help prevent it.