AutoCodes – GMC – P0BA1 GMC

P0BA1 GMC 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 GMC 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 787

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

What does this mean?

What are the Possible Causes of the DTC P0BA1 GMC?

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

How to Fix the DTC P0BA1 GMC?

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 GMC 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 GMC Code

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

- Common symptoms include a check engine light, reduced fuel efficiency, and potentially poor vehicle performance.

2. What are the possible causes of OBDII code P0BA1 indicating Hybrid/Electric Vehicle Battery 21 Circuit Low Voltage?

- The code can be triggered by issues such as a faulty battery, damaged battery wiring, or a malfunctioning battery control module.

3. How can I diagnose the source of OBDII code P0BA1 in my GMC Hybrid/Electric Vehicle?

- It is recommended to perform a thorough inspection of the battery, wiring, and control module. Checking for loose connections and conducting voltage tests can help pinpoint the issue.

4. Can I continue driving my GMC Hybrid/Electric Vehicle with OBDII code P0BA1 present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the battery system and potentially compromise vehicle safety.

5. What are some repair tips for addressing OBDII code P0BA1 Hybrid/Electric Vehicle Battery 21 Circuit Low Voltage?

- Repair tips may include repairing or replacing damaged wiring, testing and replacing the battery if necessary, and resetting the fault code after completing repairs.

6. How much does it typically cost to repair OBDII code P0BA1 in a GMC Hybrid/Electric Vehicle?

- Repair costs can vary depending on the extent of the damage and the specific parts that need to be replaced. It is recommended to consult with a professional mechanic for an accurate estimate.

7. Is it possible to reset the OBDII code P0BA1 in a GMC Hybrid/Electric Vehicle without making any repairs?

- While clearing the fault code may temporarily turn off the check engine light, it is important to address the underlying issue causing the code to prevent further problems.

8. Can extreme weather conditions affect the occurrence of OBDII code P0BA1 in a GMC Hybrid/Electric Vehicle?

- Yes, extreme temperatures can impact the performance of the vehicle's battery system, potentially leading to low voltage issues and triggering the fault code.

9. Will OBDII code P0BA1 in a GMC Hybrid/Electric Vehicle cause the vehicle to completely lose power?

- In some cases, the vehicle may go into a reduced power mode or fail to start if the battery voltage is too low due to the code. It is essential to address the issue promptly.

10. How often should I have the battery system of my GMC Hybrid/Electric Vehicle inspected to prevent OBDII code P0BA1 from occurring?

- Regular maintenance, including annual battery system inspections, can help prevent issues that lead to code P0BA1. Additionally, addressing any warning signs promptly can help avoid more severe problems.