AutoCodes – Buick – P0BAA Buick

P0BAA Buick Code - Hybrid/Electric Vehicle Battery 23 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: P0BAA Buick indicates Hybrid/Electric Vehicle Battery 23 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 822

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 P0BAA 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 P0BAA Buick - Hybrid/Electric Vehicle Battery 23 Circuit Performance - AutoCodes.com — P0BAA Buick Code - Hybrid/Electric Vehicle Battery 23 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0BAA Buick?

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

How to Fix the DTC P0BAA 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 P0BAA 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 P0BAA Buick Code

1. What are the common symptoms of OBDII code P0BAA in a Buick hybrid/electric vehicle?

- Common symptoms include reduced fuel efficiency, loss of power, and difficulty starting the vehicle.

2. What could cause the OBDII code P0BAA to trigger in a Buick hybrid/electric vehicle?

- The code P0BAA is typically triggered by issues related to the hybrid/electric vehicle battery 23 circuit performance, such as a faulty battery cell or wiring.

3. How serious is the OBDII code P0BAA in a Buick hybrid/electric vehicle?

- The code P0BAA indicates a problem with the hybrid/electric vehicle battery 23 circuit performance, which can impact the vehicle's drivability and efficiency. It is recommended to address this issue promptly.

4. Can I continue driving my Buick hybrid/electric vehicle with the OBDII code P0BAA present?

- It is not recommended to continue driving the vehicle with the code P0BAA present, as it can lead to further damage to the hybrid/electric system and potentially leave you stranded.

5. How can I diagnose and repair OBDII code P0BAA in my Buick hybrid/electric vehicle?

- Diagnosis typically involves inspecting the hybrid/electric vehicle battery, checking for loose connections, and testing the battery cells. Repair may involve replacing a faulty battery cell or repairing damaged wiring.

6. Are there any DIY tips for addressing the OBDII code P0BAA in a Buick hybrid/electric vehicle?

- While basic inspections like checking for loose connections can be done DIY, diagnosing and repairing the hybrid/electric system should be left to trained professionals due to the complexity and high voltage involved.

7. How much does it cost to fix the OBDII code P0BAA in a Buick hybrid/electric vehicle?

- The cost of repairing the code P0BAA can vary depending on the specific issue identified, parts needed for replacement, and labor costs. It is recommended to obtain quotes from reputable repair shops.

8. Can a faulty hybrid/electric vehicle battery cause the OBDII code P0BAA to trigger?

- Yes, a faulty hybrid/electric vehicle battery, particularly issues with the battery 23 circuit performance, can trigger the OBDII code P0BAA in a Buick hybrid/electric vehicle.

9. How long does it typically take to repair the OBDII code P0BAA in a Buick hybrid/electric vehicle?

- The repair time for the code P0BAA can vary depending on the exact cause of the issue and the availability of parts. It is best to consult with a professional technician for a more accurate estimate.

10. Is it possible for the OBDII code P0BAA to return after it has been cleared in a Buick hybrid/electric vehicle?

- If the underlying issue causing the code P0BAA is not properly addressed, it is possible for the code to return. It is important to diagnose and repair the root cause of the problem to prevent recurrence.