AutoCodes – Chevrolet – P0BB9 Chevrolet

P0BB9 Chevrolet Code - Hybrid/Electric Vehicle Battery 26 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: P0BB9 Chevrolet indicates Hybrid/Electric Vehicle Battery 26 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 871

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 P0BB9 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 P0BB9 Chevrolet - Hybrid/Electric Vehicle Battery 26 Circuit Performance - AutoCodes.com — P0BB9 Chevrolet Code - Hybrid/Electric Vehicle Battery 26 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0BB9 Chevrolet?

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

How to Fix the DTC P0BB9 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 P0BB9 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 P0BB9 Chevrolet Code

1. What are the common symptoms of OBDII code P0BB9 in a Chevrolet hybrid/electric vehicle?

- Common symptoms include a decrease in fuel efficiency, loss of power, and illuminated warning lights on the dashboard related to the battery system.

2. What are the possible causes of OBDII code P0BB9 in a Chevrolet hybrid/electric vehicle?

- The code P0BB9 typically indicates a problem with the Hybrid/Electric Vehicle Battery 26 Circuit, which could be caused by a faulty battery pack, damaged wiring, or a malfunctioning battery management system.

3. How can I diagnose OBDII code P0BB9 in my Chevrolet hybrid/electric vehicle?

- Diagnosis of P0BB9 requires specialized diagnostic equipment to scan the vehicle's onboard computer for specific fault codes related to the Hybrid/Electric Vehicle Battery 26 Circuit performance.

4. Can I continue driving my Chevrolet hybrid/electric vehicle with OBDII code P0BB9 present?

- It is not recommended to continue driving the vehicle with code P0BB9 present, as it can lead to further damage to the battery system and potentially unsafe driving conditions.

5. How can I repair OBDII code P0BB9 in my Chevrolet hybrid/electric vehicle?

- Repairing OBDII code P0BB9 may involve inspecting and repairing damaged wiring, replacing the hybrid/electric vehicle battery pack, or recalibrating the battery management system. Professional assistance is recommended for accurate diagnosis and repair.

6. Are there any DIY tips for troubleshooting OBDII code P0BB9 in a Chevrolet hybrid/electric vehicle?

- DIY troubleshooting tips include checking the battery connections for corrosion, inspecting the wiring harness for damage, and ensuring the battery pack is securely installed and functioning properly.

7. How much does it typically cost to repair OBDII code P0BB9 in a Chevrolet hybrid/electric vehicle?

- The cost of repairing OBDII code P0BB9 can vary depending on the specific issue causing the code, the extent of the damage, and whether the repair is done by a dealership or an independent repair shop. Costs can range from a few hundred to a few thousand dollars.

8. Can OBDII code P0BB9 be cleared/reset without fixing the underlying issue in a Chevrolet hybrid/electric vehicle?

- Clearing or resetting OBDII code P0BB9 without addressing the underlying issue is not recommended, as the code will likely return once the problem persists. It is important to diagnose and repair the root cause of the code to ensure safe and reliable vehicle operation.

9. Are there any recalls or technical service bulletins related to OBDII code P0BB9 in Chevrolet hybrid/electric vehicles?

- It is recommended to check with Chevrolet dealership or the manufacturer's website for any recalls or technical service bulletins related to OBDII code P0BB9 in specific models of hybrid/electric vehicles.

10. How can regular maintenance help prevent OBDII code P0BB9 in a Chevrolet hybrid/electric vehicle?

- Regular maintenance, including routine inspections of the battery system, electrical components, and hybrid/electric vehicle components, can help prevent issues that may trigger OBDII code P0BB9. Following the manufacturer's recommended maintenance schedule is essential for optimal vehicle performance and reliability.