AutoCodes – Buick – P0BA1 Buick

P0BA1 Buick Code - Hybrid/Electric Vehicle Battery 21 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: P0BA1 Buick indicates Hybrid/Electric Vehicle Battery 21 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 833

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 P0BA1 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 P0BA1 Buick - Hybrid/Electric Vehicle Battery 21 Circuit Low Voltage - AutoCodes.com — P0BA1 Buick Code - Hybrid/Electric Vehicle Battery 21 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0BA1 Buick?

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

How to Fix the DTC P0BA1 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 P0BA1 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 P0BA1 Buick Code

1. What are the common symptoms of OBDII code P0BA1 in a Buick Hybrid/Electric Vehicle?

Symptoms may include a check engine light, reduced engine power, poor fuel efficiency, and difficulty starting the vehicle.

2. What are the possible causes of the Hybrid/Electric Vehicle Battery 21 Circuit Low Voltage code in a Buick?

Potential causes include a faulty high voltage battery, damaged battery cables, poor electrical connections, or issues with the battery management system.

3. How can I diagnose the P0BA1 code in my Buick Hybrid/Electric Vehicle?

Diagnosis usually involves using a scan tool to read the code and conducting a thorough inspection of the high voltage battery system, including checking for loose connections and testing the batteryâ€™s voltage.

4. Can I continue driving my Buick with the P0BA1 code present?

It is not recommended to drive the vehicle with this code as it can lead to further damage to the hybrid/electric system. It is best to have the issue diagnosed and repaired promptly.

5. Is it safe to work on the high voltage system related to OBDII code P0BA1?

Working on the high voltage system of a hybrid/electric vehicle can be dangerous and requires specialized training and equipment. It is recommended to seek assistance from a qualified technician.

6. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 21 Circuit Low Voltage issue in a Buick?

The cost of repairs can vary depending on the exact cause of the issue. It is advisable to get a diagnostic from a professional technician to determine the cost accurately.

7. Can a DIY enthusiast repair the P0BA1 code in a Buick Hybrid/Electric Vehicle?

Due to the complexity and high voltage nature of the system, it is not recommended for DIY enthusiasts to attempt repairs on the high voltage system related to this code.

8. Will resetting the OBDII code P0BA1 in my Buick make the issue go away?

Simply clearing the code without addressing the underlying problem will not solve the issue. It is important to diagnose and repair the root cause to prevent the code from reappearing.

9. How urgent is it to address the Hybrid/Electric Vehicle Battery 21 Circuit Low Voltage code in a Buick?

It is important to address this code promptly to prevent potential damage to the vehicle's hybrid/electric system and ensure optimal performance and safety.

10. Can extreme weather conditions affect the occurrence of the P0BA1 code in a Buick Hybrid/Electric Vehicle?

Extreme temperatures can impact the performance of the high voltage battery system, potentially leading to the occurrence of the P0BA1 code. It is advisable to monitor the system in such conditions.