AutoCodes – GMC – P0BA9 GMC

P0BA9 GMC Code - Hybrid/Electric Vehicle Battery 23 Circuit

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: P0BA9 GMC indicates Hybrid/Electric Vehicle Battery 23 Circuit .
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 952

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 P0BA9 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 P0BA9 GMC - Hybrid/Electric Vehicle Battery 23 Circuit - AutoCodes.com — P0BA9 GMC Code - Hybrid/Electric Vehicle Battery 23 Circuit

What does this mean?

What are the Possible Causes of the DTC P0BA9 GMC?

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

How to Fix the DTC P0BA9 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 P0BA9 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 P0BA9 GMC Code

1. What does the OBDII code P0BA9 mean on a GMC vehicle?

P0BA9 indicates a fault in the circuit of the Hybrid/Electric Vehicle Battery 23, which typically refers to an issue with a specific cell or module in the battery pack.

2. What are the common symptoms of the P0BA9 code in a GMC?

Symptoms may include reduced fuel efficiency, decreased electric range, an illuminated check engine light, and limited hybrid functionality.

3. What causes the P0BA9 code to appear?

Common causes include a faulty battery module, damaged wiring or connectors in the battery circuit, or a malfunction in the battery management system.

4. Is it safe to drive with the P0BA9 code active?

Driving with the P0BA9 code is not recommended, as it may lead to further damage to the hybrid battery system and reduced vehicle performance.

5. How is the P0BA9 code diagnosed in a GMC?

A mechanic will use a scan tool to read the code, inspect the battery pack and its wiring for damage, and test the battery module's voltage and resistance.

6. Can a weak 12-volt battery trigger the P0BA9 code?

While possible, the P0BA9 code specifically relates to the high-voltage hybrid battery circuit, not the 12-volt battery.

7. What repairs are typically needed for a P0BA9 code?

Repairs may include replacing the faulty battery module, repairing damaged wiring or connectors, or recalibrating the battery management system.

8. How much does it cost to fix the P0BA9 code on a GMC?

Repair costs vary, but replacing a hybrid battery module can range from $500 to $2,000, depending on the vehicle and labor rates.

9. Can the P0BA9 code be cleared without repairs?

The code may clear temporarily, but it will likely return if the underlying issue is not addressed.

10. How can I prevent the P0BA9 code from occurring again?

Regular maintenance, avoiding extreme temperatures, and ensuring proper charging practices can help prolong the life of the hybrid battery and reduce the risk of circuit issues.