AutoCodes – Chevrolet – P0BA1 Chevrolet

P0BA1 Chevrolet 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 Chevrolet 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 1,125

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

What does this mean?

What are the Possible Causes of the DTC P0BA1 Chevrolet?

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

How to Fix the DTC P0BA1 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 P0BA1 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 P0BA1 Chevrolet Code

1. What does the OBDII code P0BA1 for Chevrolet Hybrid/Electric Vehicle Battery 21 Circuit Low Voltage indicate?

The code P0BA1 suggests that there is low voltage detected in the 21st circuit of the hybrid/electric vehicle battery system.

2. What are the common symptoms of OBDII code P0BA1 in a Chevrolet hybrid/electric vehicle?

Common symptoms of P0BA1 may include decreased fuel efficiency, decreased power output, and potential issues with the vehicle's hybrid/electric system.

3. What are some possible causes of the P0BA1 code in a Chevrolet hybrid/electric vehicle?

Potential causes of the P0BA1 code can include a faulty battery pack, damaged wiring in the 21st circuit, or issues with the battery management system.

4. How can I diagnose the OBDII code P0BA1 in my Chevrolet hybrid/electric vehicle?

To diagnose the P0BA1 code, you may need to perform a thorough inspection of the battery pack, check the wiring in the 21st circuit, and use a diagnostic scanner to analyze the battery system.

5. Is it safe to continue driving with the P0BA1 code in my Chevrolet hybrid/electric vehicle?

It is not recommended to drive with the P0BA1 code present, as it can lead to further damage to the battery system and potentially compromise the vehicle's performance and safety.

6. What are some repair tips for fixing the P0BA1 code in a Chevrolet hybrid/electric vehicle?

Repair tips for addressing the P0BA1 code may include checking and repairing any damaged wiring, replacing the battery pack if necessary, and resetting the battery management system.

7. Can I reset the OBDII code P0BA1 in my Chevrolet hybrid/electric vehicle on my own?

You may be able to reset the P0BA1 code using an OBDII scanner, but it is essential to address the underlying issue causing the code to prevent it from reoccurring.

8. Do I need to take my Chevrolet hybrid/electric vehicle to a dealership for the P0BA1 code repair?

While a dealership may have specialized knowledge and tools for hybrid/electric vehicle repairs, an experienced mechanic familiar with these systems can also diagnose and repair the P0BA1 code.

9. Is the P0BA1 code specific to certain Chevrolet hybrid/electric vehicle models?

The P0BA1 code related to the Hybrid/Electric Vehicle Battery 21 Circuit Low Voltage is specific to Chevrolet hybrid/electric vehicles and may vary in its application across different models.

10. How can I prevent the OBDII code P0BA1 from appearing in my Chevrolet hybrid/electric vehicle in the future?

Regular maintenance, including checking the battery system, monitoring voltage levels, and addressing any warning signs promptly, can help prevent the recurrence of the P0BA1 code in your Chevrolet hybrid/electric vehicle.