AutoCodes – GMC – P0B4A GMC

P0B4A GMC Code - Hybrid/Electric Vehicle Battery 4 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: P0B4A GMC indicates Hybrid/Electric Vehicle Battery 4 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 974

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B4A 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 P0B4A GMC - Hybrid/Electric Vehicle Battery 4 Circuit - AutoCodes.com — P0B4A GMC Code - Hybrid/Electric Vehicle Battery 4 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B4A GMC?

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

How to Fix the DTC P0B4A 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 P0B4A 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 P0B4A GMC Code

1. What are the common symptoms of OBDII code P0B4A in a GMC hybrid/electric vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential warning lights on the dashboard related to the hybrid/electric system.

2. What causes the OBDII code P0B4A in a GMC hybrid/electric vehicle?

- This code is typically triggered by a malfunction in Hybrid/Electric Vehicle Battery 4 Circuit, which could be due to issues with the battery module, wiring, connectors, or control module.

3. How can I diagnose the cause of OBDII code P0B4A in my GMC hybrid/electric vehicle?

- Proper diagnosis requires the use of a diagnostic scanner capable of reading hybrid/electric vehicle codes, along with thorough inspection of the battery system components mentioned in the trouble code description.

4. Can I still drive my GMC hybrid/electric vehicle with OBDII code P0B4A active?

- It is not recommended to continue driving the vehicle with this code active, as it could lead to further damage to the hybrid/electric system. Prompt attention and repair are advised.

5. Are there any DIY repair tips for addressing OBDII code P0B4A in a GMC hybrid/electric vehicle?

- DIY repair for this code is not recommended due to the complexity and high voltage nature of hybrid/electric vehicle systems. It is best to seek professional assistance from a qualified technician.

6. How much does it typically cost to repair OBDII code P0B4A in a GMC hybrid/electric vehicle?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing faulty battery components, which can range from a few hundred to a few thousand dollars.

7. Can resetting the OBDII code P0B4A clear the issue in a GMC hybrid/electric vehicle?

- Clearing the code may temporarily turn off the warning light, but it will not fix the underlying problem causing the code. Proper diagnosis and repair are necessary to resolve the issue.

8. Is the Hybrid/Electric Vehicle Battery 4 Circuit covered under warranty by GMC?

- The coverage of this specific component under warranty can vary depending on the vehicle's age, mileage, and warranty status. It is advisable to check with a GMC dealership for more information.

9. How often does OBDII code P0B4A occur in GMC hybrid/electric vehicles?

- The occurrence of this code can vary and is not extremely common, but it is important to address it promptly to prevent further issues with the hybrid/electric system.

10. What are the long-term consequences of ignoring OBDII code P0B4A in a GMC hybrid/electric vehicle?

- Ignoring this code can lead to more severe damage to the hybrid/electric system, potentially resulting in complete system failure and costly repairs. It is crucial to address the issue promptly.