AutoCodes – GMC – P0BB4 GMC

P0BB4 GMC Code - Hybrid/Electric Vehicle Battery 25 Circuit Performance

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: P0BB4 GMC indicates Hybrid/Electric Vehicle Battery 25 Circuit Performance.
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 877

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 P0BB4 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 P0BB4 GMC - Hybrid/Electric Vehicle Battery 25 Circuit Performance - AutoCodes.com — P0BB4 GMC Code - Hybrid/Electric Vehicle Battery 25 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0BB4 GMC?

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

How to Fix the DTC P0BB4 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 P0BB4 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 P0BB4 GMC Code

1. What are the common symptoms of OBDII code P0BB4 in a GMC hybrid/electric vehicle?

The common symptoms of code P0BB4 include reduced hybrid/electric vehicle performance, decreased fuel efficiency, and potential issues with the vehicle's battery system.

2. What are the possible causes of OBDII code P0BB4 in a GMC hybrid/electric vehicle?

The code P0BB4 typically indicates a malfunction in the Hybrid/Electric Vehicle Battery 25 Circuit, which could be caused by wiring issues, damaged connectors, or a faulty battery control module.

3. How can I diagnose OBDII code P0BB4 in my GMC hybrid/electric vehicle?

Diagnosing code P0BB4 requires using a professional OBDII scanner to retrieve the specific fault code. Additionally, a thorough inspection of the vehicle's battery system, wiring, and connectors may be necessary to pinpoint the exact cause.

4. What are some repair tips for addressing OBDII code P0BB4 in a GMC hybrid/electric vehicle?

Repairing code P0BB4 may involve repairing or replacing damaged wiring, connectors, or components in the Hybrid/Electric Vehicle Battery 25 Circuit. It is recommended to consult a professional mechanic or dealership for accurate diagnosis and repair.

5. Is it safe to continue driving with OBDII code P0BB4 present in a GMC hybrid/electric vehicle?

It is not recommended to continue driving with code P0BB4 present, as it can lead to further damage to the vehicle's battery system and potentially affect the overall performance and safety of the vehicle.

6. Can I reset OBDII code P0BB4 in a GMC hybrid/electric vehicle on my own?

While you may be able to clear the fault code temporarily by disconnecting the vehicle's battery, it is important to address the underlying issue causing code P0BB4 to prevent it from recurring.

7. How much does it typically cost to repair OBDII code P0BB4 in a GMC hybrid/electric vehicle?

The cost of repairing code P0BB4 can vary depending on the extent of the damage and the specific components that need to be repaired or replaced. It is advisable to obtain a professional diagnosis to determine the exact cost.

8. Can a DIY enthusiast repair OBDII code P0BB4 in a GMC hybrid/electric vehicle?

While some DIY enthusiasts may have the skills to address simple wiring or connector issues, diagnosing and repairing code P0BB4 in a hybrid/electric vehicle often requires specialized knowledge and equipment best handled by a professional mechanic.

9. How often does OBDII code P0BB4 occur in GMC hybrid/electric vehicles?

Code P0BB4 related to Hybrid/Electric Vehicle Battery 25 Circuit Performance is relatively uncommon but can occur due to various factors such as age, wear and tear, or manufacturing defects in the vehicle's electrical system.

10. Is there a recall or technical service bulletin related to OBDII code P0BB4 in GMC hybrid/electric vehicles?

It is advisable to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins related to OBDII code P0BB4 in GMC hybrid/electric vehicles, as they may offer guidance or assistance in addressing the issue.