AutoCodes – GMC – P1BB7 GMC

P1BB7 GMC Code - Hybrid/Electric Vehicle Battery 71 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: P1BB7 GMC indicates Hybrid/Electric Vehicle Battery 71 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 838

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BB7 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 P1BB7 GMC - Hybrid/Electric Vehicle Battery 71 Circuit Performance - AutoCodes.com — P1BB7 GMC Code - Hybrid/Electric Vehicle Battery 71 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BB7 GMC?

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

How to Fix the DTC P1BB7 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 P1BB7 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 P1BB7 GMC Code

1. What are common symptoms of OBDII code P1BB7 in a GMC Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid system performance, illuminated warning lights on the dashboard, and potential issues with the battery system.

2. What can cause the OBDII code P1BB7 Hybrid/Electric Vehicle Battery 71 Circuit Performance in a GMC vehicle?

- The code P1BB7 can be triggered by issues such as a faulty hybrid/electric vehicle battery, damaged battery cells, poor battery connections, or a problem with the battery control module.

3. How serious is the OBDII code P1BB7 Hybrid/Electric Vehicle Battery 71 Circuit Performance in a GMC vehicle?

- This code can indicate a significant issue with the hybrid/electric vehicle battery system, potentially affecting the vehicle's performance and efficiency. It is important to address this code promptly.

4. Can I continue driving my GMC Hybrid/Electric Vehicle with the OBDII code P1BB7 present?

- It is not recommended to continue driving the vehicle with this code activated, as it can lead to further damage to the hybrid/electric vehicle battery system and may result in reduced performance or safety risks.

5. How can I diagnose and repair the OBDII code P1BB7 in my GMC Hybrid/Electric Vehicle?

- Diagnosis typically involves inspecting the hybrid/electric vehicle battery system, checking for any visible damage or loose connections, and using diagnostic tools to analyze the battery's performance. Repair may involve replacing the battery or addressing underlying issues.

6. Are there any DIY tips for troubleshooting the OBDII code P1BB7 in a GMC Hybrid/Electric Vehicle?

- While basic inspections like checking for loose connections or visible damage can be done DIY, diagnosing and repairing the code P1BB7 often requires specialized tools and expertise. It is recommended to seek professional help for accurate diagnosis and repair.

7. How much does it cost to fix the OBDII code P1BB7 Hybrid/Electric Vehicle Battery 71 Circuit Performance in a GMC vehicle?

- The cost of fixing this code can vary depending on the specific issue causing it, the extent of the repairs needed, and whether any parts require replacement. Costs may range from a few hundred to a few thousand dollars.

8. Can resetting the OBDII code P1BB7 in a GMC Hybrid/Electric Vehicle make it disappear permanently?

- Resetting the code may temporarily turn off the warning light, 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 for a permanent solution.

9. How often does the OBDII code P1BB7 Hybrid/Electric Vehicle Battery 71 Circuit Performance occur in GMC vehicles?

- The occurrence of this code can vary depending on the vehicle's age, usage, and maintenance history. It is more common in older hybrid/electric vehicles or those with battery system issues.

10. Is it safe to drive my GMC Hybrid/Electric Vehicle if the OBDII code P1BB7 is intermittent?

- It is not advisable to drive the vehicle with intermittent occurrences of this code, as it indicates an underlying issue with the hybrid/electric vehicle battery system that can affect performance and safety. Prompt diagnosis and repair are recommended.