AutoCodes – GMC – P0BAC GMC

P0BAC GMC Code - Hybrid/Electric Vehicle Battery 23 Circuit High 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: P0BAC GMC indicates Hybrid/Electric Vehicle Battery 23 Circuit High 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 894

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 P0BAC 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 P0BAC GMC - Hybrid/Electric Vehicle Battery 23 Circuit High Voltage - AutoCodes.com — P0BAC GMC Code - Hybrid/Electric Vehicle Battery 23 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0BAC GMC?

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

How to Fix the DTC P0BAC 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 P0BAC 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 P0BAC GMC Code

1. What are the common symptoms of OBDII code P0BAC in a GMC Hybrid/Electric vehicle?

- Common symptoms include reduced fuel efficiency, loss of power, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P0BAC indicating Hybrid/Electric Vehicle Battery 23 Circuit High Voltage in a GMC?

- The code can be triggered by issues with the high voltage circuit in the hybrid/electric vehicle battery system, such as a faulty battery pack or a problem with the battery control module.

3. How can I diagnose the cause of OBDII code P0BAC in my GMC Hybrid/Electric vehicle?

- A thorough diagnostic scan using an OBDII scanner and specialized hybrid/electric vehicle diagnostic tools can help pinpoint the exact cause of the code.

4. Is it safe to continue driving my GMC Hybrid/Electric vehicle with OBDII code P0BAC present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the hybrid/electric system and potentially unsafe driving conditions.

5. How can I reset OBDII code P0BAC in my GMC Hybrid/Electric vehicle?

- While you can clear the code using an OBDII scanner, it is important to address the root cause of the issue to prevent the code from reoccurring.

6. Can I repair OBDII code P0BAC in my GMC Hybrid/Electric vehicle myself?

- Repairing this code often requires specialized knowledge and tools related to hybrid/electric vehicle systems, so it is recommended to seek professional assistance for proper diagnosis and repair.

7. How much does it typically cost to repair OBDII code P0BAC in a GMC Hybrid/Electric vehicle?

- The cost of repairs can vary depending on the exact cause of the code, but it may involve replacing components in the hybrid/electric battery system, which can be a costly repair.

8. Are there any maintenance tips to prevent OBDII code P0BAC from appearing in my GMC Hybrid/Electric vehicle?

- Regular maintenance of the hybrid/electric battery system, including checking for leaks, ensuring proper cooling, and following manufacturer recommendations, can help prevent issues that trigger this code.

9. Can extreme weather conditions impact the occurrence of OBDII code P0BAC in a GMC Hybrid/Electric vehicle?

- Yes, extreme temperatures can affect the performance of the hybrid/electric battery system, potentially leading to issues that trigger this code.

10. How long does it typically take to repair OBDII code P0BAC in a GMC Hybrid/Electric vehicle?

- The repair time can vary depending on the complexity of the issue and availability of parts, but it may take several hours to a few days to diagnose and fix the problem correctly.