AutoCodes – Buick – P0BA7 Buick

P0BA7 Buick Code - Hybrid/Electric Vehicle Battery 22 Circuit High 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: P0BA7 Buick indicates Hybrid/Electric Vehicle Battery 22 Circuit High 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 959

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 P0BA7 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 P0BA7 Buick - Hybrid/Electric Vehicle Battery 22 Circuit High Voltage - AutoCodes.com — P0BA7 Buick Code - Hybrid/Electric Vehicle Battery 22 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0BA7 Buick?

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

How to Fix the DTC P0BA7 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 P0BA7 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 P0BA7 Buick Code

1. What are common symptoms of OBDII code P0BA7 in a Buick Hybrid/Electric Vehicle?

- Common symptoms include illuminated check engine light, reduced fuel efficiency, and potential drivability issues.

2. What does the OBDII code P0BA7 for Hybrid/Electric Vehicle Battery 22 Circuit High Voltage indicate?

- This code indicates a high voltage condition in the Hybrid/Electric Vehicle Battery 22 Circuit.

3. What are possible causes of OBDII code P0BA7 in a Buick Hybrid/Electric Vehicle?

- Possible causes include issues with the high voltage battery, faulty wiring or connections in Circuit 22, or a malfunctioning battery management system.

4. How can I diagnose the cause of OBDII code P0BA7 in my Buick Hybrid/Electric Vehicle?

- Diagnosing the exact cause may require advanced diagnostic tools and expertise. It is recommended to consult a qualified technician or dealership for accurate diagnosis.

5. Can I continue driving my Buick with OBDII code P0BA7 present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the high voltage system.

6. What are some repair tips for resolving OBDII code P0BA7 in a Buick Hybrid/Electric Vehicle?

- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections in Circuit 22, and addressing any issues with the high voltage battery.

7. Is it safe to attempt repairs on the high voltage system related to OBDII code P0BA7 myself?

- Due to the high voltage nature of the system, it is recommended to leave repairs related to OBDII code P0BA7 to trained professionals to ensure safety and proper resolution.

8. How much does it typically cost to repair OBDII code P0BA7 in a Buick Hybrid/Electric Vehicle?

- Repair costs can vary depending on the exact cause of the code and the required repairs. It is advisable to obtain a diagnosis from a qualified technician for an accurate estimate.

9. Can OBDII code P0BA7 be a recurring issue in a Buick Hybrid/Electric Vehicle?

- If the root cause of the code is not properly addressed, it is possible for OBDII code P0BA7 to recur. Thorough diagnosis and repair are essential to prevent recurrence.

10. How can regular maintenance help prevent OBDII code P0BA7 in a Buick Hybrid/Electric Vehicle?

- Regular maintenance, including scheduled inspections of the high voltage system and battery, can help identify potential issues early and prevent the occurrence of OBDII code P0BA7.