AutoCodes – Chevrolet – P0B9B Chevrolet

P0B9B Chevrolet Code - Hybrid/Electric Vehicle Battery 20 Circuit Performance

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: P0B9B Chevrolet indicates Hybrid/Electric Vehicle Battery 20 Circuit Performance.
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 784

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 P0B9B 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 P0B9B Chevrolet - Hybrid/Electric Vehicle Battery 20 Circuit Performance - AutoCodes.com — P0B9B Chevrolet Code - Hybrid/Electric Vehicle Battery 20 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B9B Chevrolet?

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

How to Fix the DTC P0B9B 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 P0B9B 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 P0B9B Chevrolet Code

1. What are the common symptoms of OBDII code P0B9B in a Chevrolet hybrid/electric vehicle?

- Common symptoms include poor fuel economy, reduced power, and potential issues with the hybrid/electric powertrain.

2. What are the possible causes of OBDII code P0B9B in a Chevrolet hybrid/electric vehicle?

- The code may be triggered by issues with the hybrid/electric vehicle battery, such as a faulty battery cell, wiring issues, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P0B9B in my Chevrolet hybrid/electric vehicle?

- Proper diagnosis requires a comprehensive scan tool to read the code, as well as testing the battery voltage, connections, and overall health of the hybrid/electric vehicle system.

4. Can I drive my Chevrolet hybrid/electric vehicle with OBDII code P0B9B?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the hybrid/electric components and potentially affect the vehicle's performance.

5. What are some repair tips for fixing OBDII code P0B9B in a Chevrolet hybrid/electric vehicle?

- Repair tips may include checking and cleaning battery connections, testing individual battery cells, and ensuring proper functioning of the battery management system.

6. How much does it typically cost to repair OBDII code P0B9B in a Chevrolet hybrid/electric vehicle?

- The cost of repair can vary depending on the exact cause of the code, but it may involve replacing faulty battery components or addressing wiring issues, which can range from a few hundred to a few thousand dollars.

7. Can I reset the OBDII code P0B9B in my Chevrolet hybrid/electric vehicle using a simple OBDII scanner?

- While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from recurring.

8. How often does OBDII code P0B9B occur in Chevrolet hybrid/electric vehicles?

- The occurrence of this code can vary depending on the vehicle's age, mileage, and overall condition of the hybrid/electric components.

9. Are there any preventive maintenance measures to avoid OBDII code P0B9B in a Chevrolet hybrid/electric vehicle?

- Regularly inspecting and maintaining the hybrid/electric vehicle battery, as well as following the manufacturer's recommended maintenance schedule, can help prevent issues leading to this code.

10. Is it safe to attempt DIY repairs for OBDII code P0B9B in a Chevrolet hybrid/electric vehicle?

- DIY repairs are not recommended unless you have the necessary knowledge and experience working with hybrid/electric vehicle systems, as incorrect repairs can be dangerous and costly.