AutoCodes – Chevrolet – P0B72 Chevrolet

P0B72 Chevrolet Code - Hybrid/Electric Vehicle Battery 12 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: P0B72 Chevrolet indicates Hybrid/Electric Vehicle Battery 12 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 919

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 P0B72 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 P0B72 Chevrolet - Hybrid/Electric Vehicle Battery 12 Circuit - AutoCodes.com — P0B72 Chevrolet Code - Hybrid/Electric Vehicle Battery 12 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B72 Chevrolet?

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

How to Fix the DTC P0B72 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 P0B72 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 P0B72 Chevrolet Code

1. What does OBDII code P0B72 for a Chevrolet Hybrid/Electric Vehicle Battery 12 Circuit indicate?

The code P0B72 typically denotes an issue related to the 12-volt auxiliary battery circuit in a Chevrolet hybrid or electric vehicle.

2. What are some common symptoms of OBDII code P0B72 in a Chevrolet hybrid or electric vehicle?

Common symptoms may include difficulty starting the vehicle, warning lights on the dashboard, electrical system malfunctions, and potential issues with the vehicle's hybrid or electric powertrain.

3. What are possible causes of OBDII code P0B72 in a Chevrolet hybrid or electric vehicle?

Causes of this code can include a faulty auxiliary battery, poor battery connections, wiring issues, a malfunctioning battery management system, or other electrical faults within the vehicle.

4. How can I diagnose the OBDII code P0B72 in a Chevrolet hybrid or electric vehicle?

Diagnosis typically involves using a scan tool to retrieve the specific fault code, checking the condition of the auxiliary battery, inspecting battery connections and wiring, and testing the battery management system for any malfunctions.

5. Can I still drive my Chevrolet hybrid or electric vehicle with the OBDII code P0B72 present?

It is not recommended to drive the vehicle with this code active, as it can lead to potential electrical issues and affect the performance of the hybrid or electric powertrain.

6. How can I repair OBDII code P0B72 in my Chevrolet hybrid or electric vehicle?

Repair options may include replacing the auxiliary battery if it is faulty, ensuring proper battery connections, repairing any damaged wiring, and addressing any issues with the battery management system as needed.

7. Is it safe to reset the OBDII code P0B72 in a Chevrolet hybrid or electric vehicle without addressing the underlying issue?

Resetting the code without fixing the root cause may temporarily clear the warning lights, but the underlying problem will persist and could lead to further issues down the line. It is recommended to diagnose and repair the problem first.

8. Are there any preventive maintenance tips to avoid OBDII code P0B72 in a Chevrolet hybrid or electric vehicle?

Regularly checking the condition of the auxiliary battery, maintaining clean and secure battery connections, and ensuring the electrical system is in good working order can help prevent issues that trigger this fault code.

9. How long does it typically take to repair OBDII code P0B72 in a Chevrolet hybrid or electric vehicle?

The repair time can vary depending on the exact cause of the issue. Simple fixes like replacing the auxiliary battery or repairing connections may take a short amount of time, while diagnosing and addressing more complex electrical faults could require more extensive work.

10. Can I reset the OBDII code P0B72 in a Chevrolet hybrid or electric vehicle myself, or do I need to take it to a professional mechanic?

Resetting the code can often be done by disconnecting the vehicle's battery for a few minutes or using a scan tool to clear the code. However, if you are not confident in diagnosing and repairing the underlying issue, it is recommended to seek the assistance of a qualified mechanic to properly address the problem.