AutoCodes – GMC – P0BB6 GMC

P0BB6 GMC Code - Hybrid/Electric Vehicle Battery 25 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: P0BB6 GMC indicates Hybrid/Electric Vehicle Battery 25 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 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 P0BB6 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 P0BB6 GMC - Hybrid/Electric Vehicle Battery 25 Circuit High Voltage - AutoCodes.com — P0BB6 GMC Code - Hybrid/Electric Vehicle Battery 25 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0BB6 GMC?

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

How to Fix the DTC P0BB6 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 P0BB6 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 P0BB6 GMC Code

1. What are common symptoms of OBDII code P0BB6 in a GMC hybrid/electric vehicle?

- Common symptoms include reduced vehicle performance, poor fuel efficiency, and potential illumination of the check engine light.

2. What can cause the OBDII code P0BB6 related to the Hybrid/Electric Vehicle Battery 25 Circuit High Voltage in a GMC vehicle?

- The code P0BB6 can be triggered by issues such as high voltage in the battery circuit, a faulty battery management system, or damaged wiring.

3. How can I diagnose the OBDII code P0BB6 in my GMC hybrid/electric vehicle?

- Diagnosis typically involves using a professional OBDII scanner to read the fault codes, conducting a thorough inspection of the high voltage battery circuit, and testing the battery management system.

4. Is it safe to continue driving my GMC vehicle with the OBDII code P0BB6 present?

- It is not recommended to drive your vehicle with the P0BB6 code active, as it can lead to further damage to the hybrid/electric system and potentially unsafe driving conditions.

5. Can I repair the OBDII code P0BB6 in my GMC vehicle myself?

- Repairing the P0BB6 code often requires specialized knowledge and tools related to hybrid/electric vehicle systems, so it is usually best to seek professional assistance from a certified technician.

6. How much does it typically cost to repair the OBDII code P0BB6 in a GMC hybrid/electric vehicle?

- Repair costs for the P0BB6 code can vary depending on the exact cause of the issue, but they can range from a few hundred to a few thousand dollars, including parts and labor.

7. Are there any preventive maintenance tips to avoid encountering the OBDII code P0BB6 in a GMC hybrid/electric vehicle?

- Regularly inspecting the high voltage battery system, following the manufacturer's maintenance schedule, and avoiding overcharging the battery can help prevent issues that may trigger the P0BB6 code.

8. Can the OBDII code P0BB6 in a GMC hybrid/electric vehicle be related to other codes or underlying issues?

- Yes, the P0BB6 code may be associated with other related codes such as P0BB5 (Hybrid/Electric Vehicle Battery 25 Circuit Low Voltage) or P0BB7 (Hybrid/Electric Vehicle Battery 25 Circuit Voltage Mismatch).

9. How long does it typically take to repair the OBDII code P0BB6 in a GMC hybrid/electric vehicle?

- Repair times can vary based on the exact cause of the issue and the availability of parts, but it may take a few hours to a couple of days to complete the repair.

10. Can resetting the OBDII code P0BB6 in a GMC vehicle resolve the issue temporarily?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the P0BB6 fault code to reoccur. It is important to address the root cause of the issue for a lasting solution.