AutoCodes – Buick – P0BA4 Buick

P0BA4 Buick Code - Hybrid/Electric Vehicle Battery 22 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: P0BA4 Buick indicates Hybrid/Electric Vehicle Battery 22 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 1,011

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 P0BA4 Buick 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 P0BA4 Buick - Hybrid/Electric Vehicle Battery 22 Circuit - AutoCodes.com — P0BA4 Buick Code - Hybrid/Electric Vehicle Battery 22 Circuit

What does this mean?

What are the Possible Causes of the DTC P0BA4 Buick?

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

How to Fix the DTC P0BA4 Buick?

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 P0BA4 Buick 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 P0BA4 Buick Code

1. What is OBDII code P0BA4 for a Buick Hybrid/Electric Vehicle Battery 22 Circuit?

- OBDII code P0BA4 indicates an issue with the Hybrid/Electric Vehicle Battery 22 Circuit in a Buick.

2. What are common symptoms of OBDII code P0BA4 in a Buick Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and warning lights on the dashboard.

3. What are possible causes of OBDII code P0BA4 in a Buick Hybrid/Electric Vehicle?

- Causes may include a faulty battery pack, damaged wiring, poor connections, or issues with the battery management system.

4. How can I diagnose OBDII code P0BA4 in my Buick Hybrid/Electric Vehicle?

- Diagnosis typically involves using a scan tool to read the code, inspecting the battery and related components, and testing the circuit for faults.

5. Can I drive my Buick Hybrid/Electric Vehicle with OBDII code P0BA4?

- It is not recommended to drive the vehicle with this code as it can lead to further damage and potential safety risks.

6. How should I repair OBDII code P0BA4 in my Buick Hybrid/Electric Vehicle?

- Repair may involve replacing the battery pack, repairing or replacing damaged wiring, ensuring proper connections, and resetting the system.

7. Are there any DIY tips for fixing OBDII code P0BA4 in a Buick Hybrid/Electric Vehicle?

- DIY tips include checking for loose connections, inspecting wiring for damage, and following the manufacturer's diagnostic procedures.

8. Is it necessary to reset the OBDII code P0BA4 after repairs in a Buick Hybrid/Electric Vehicle?

- Yes, it is important to clear the code after repairs to reset the system and ensure proper functionality.

9. How can I prevent OBDII code P0BA4 from appearing in my Buick Hybrid/Electric Vehicle?

- Regular maintenance, timely inspections, and addressing any warning signs promptly can help prevent this code from appearing.

10. Can a professional mechanic help with diagnosing and repairing OBDII code P0BA4 in my Buick Hybrid/Electric Vehicle?

- Yes, seeking help from a qualified mechanic or dealership specializing in hybrid vehicles is recommended for accurate diagnosis and repair of this code.