AutoCodes – GMC – P0BAB GMC

P0BAB GMC Code - Hybrid/Electric Vehicle Battery 23 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: P0BAB GMC indicates Hybrid/Electric Vehicle Battery 23 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 890

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 P0BAB 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 P0BAB GMC - Hybrid/Electric Vehicle Battery 23 Circuit Low Voltage - AutoCodes.com — P0BAB GMC Code - Hybrid/Electric Vehicle Battery 23 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0BAB GMC?

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

How to Fix the DTC P0BAB 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 P0BAB 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 P0BAB GMC Code

1. What are the common symptoms of OBDII code P0BAB GMC (Hybrid/Electric Vehicle Battery 23 Circuit Low Voltage)?

The common symptoms of this code may include poor fuel economy, reduced hybrid system performance, and warning lights illuminated on the dashboard.

2. What are some possible causes of OBDII code P0BAB GMC?

Possible causes of this code may include a weak or failing hybrid/electric vehicle battery, damaged wiring or connectors in the battery circuit, or an issue with the hybrid battery control module.

3. How can I diagnose the OBDII code P0BAB GMC?

Diagnosing this code typically involves using a scan tool to retrieve the specific fault codes, checking the hybrid/electric vehicle battery voltage levels, inspecting the battery circuit wiring for any damage, and testing the hybrid battery control module.

4. Can I drive my vehicle with OBDII code P0BAB GMC?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the hybrid/electric vehicle battery or other components of the hybrid system.

5. How can I repair OBDII code P0BAB GMC?

Repairing this code may involve replacing the hybrid/electric vehicle battery, repairing or replacing damaged wiring or connectors in the battery circuit, or reprogramming the hybrid battery control module.

6. Is it safe to attempt repairs for OBDII code P0BAB GMC on my own?

Due to the complexity of hybrid/electric vehicle systems, it is recommended to seek professional help when diagnosing and repairing this code to ensure safety and proper functioning of the vehicle.

7. What is the significance of the "23 Circuit Low Voltage" in OBDII code P0BAB GMC?

The "23 Circuit Low Voltage" indicates that there is a low voltage condition detected in the specific circuit related to the hybrid/electric vehicle battery, requiring attention to prevent further issues.

8. Will resetting the OBDII code P0BAB GMC make it go away permanently?

Resetting the code may temporarily clear the warning lights, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the code.

9. How long does it typically take to repair OBDII code P0BAB GMC?

The repair time for this code can vary depending on the exact cause of the issue and the extent of repairs needed. It is advisable to consult a professional technician for an accurate assessment of the repair duration.

10. Are there any preventive measures to avoid OBDII code P0BAB GMC in the future?

Regular maintenance of the hybrid/electric vehicle battery, monitoring voltage levels, and addressing any warning signs promptly can help prevent OBDII code P0BAB GMC from occurring in the future.