AutoCodes – GMC – P1BBC GMC

P1BBC GMC Code - Hybrid/Electric Vehicle Battery 72 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: P1BBC GMC indicates Hybrid/Electric Vehicle Battery 72 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 1,104

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 P1BBC 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 P1BBC GMC - Hybrid/Electric Vehicle Battery 72 Circuit High Voltage - AutoCodes.com — P1BBC GMC Code - Hybrid/Electric Vehicle Battery 72 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BBC GMC?

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

How to Fix the DTC P1BBC 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 P1BBC 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 P1BBC GMC Code

1. What are the common symptoms of OBDII code P1BBC GMC (Hybrid/Electric Vehicle Battery 72 Circuit High Voltage)?

- Common symptoms include the check engine light coming on, reduced vehicle performance, and potential issues with the hybrid/electric system.

2. What are the possible causes of OBDII code P1BBC GMC?

- Potential causes include a faulty high voltage battery, issues with the battery management system, damaged wiring or connectors, or a malfunctioning hybrid/electric vehicle control module.

3. How can I diagnose the source of OBDII code P1BBC GMC?

- Diagnosis often involves using a scan tool to read the code and accessing the hybrid/electric system for further testing, such as checking the battery voltage levels and inspecting the related components.

4. Can I still drive my vehicle with OBDII code P1BBC GMC present?

- It is not recommended to drive the vehicle with this code present as it can lead to further damage to the high voltage system and potentially unsafe driving conditions.

5. What are some repair tips for addressing OBDII code P1BBC GMC?

- Repair tips may include checking and repairing any damaged wiring or connectors, testing and potentially replacing the high voltage battery, and recalibrating the hybrid/electric vehicle control module.

6. Is it safe to attempt DIY repairs for OBDII code P1BBC GMC?

- Due to the high voltage nature of hybrid/electric vehicle systems, it is recommended to seek professional assistance for diagnosing and repairing OBDII code P1BBC GMC to ensure safety and proper handling of components.

7. How much does it typically cost to repair OBDII code P1BBC GMC?

- Repair costs can vary depending on the specific cause of the code, but it may involve expenses for diagnostics, parts replacement, and labor, potentially ranging from a few hundred to a few thousand dollars.

8. Will resetting the check engine light make OBDII code P1BBC GMC go away?

- Simply resetting the check engine light will not resolve the underlying issue causing OBDII code P1BBC GMC. It is important to diagnose and address the root cause of the code to prevent further problems.

9. Can extreme weather conditions affect the occurrence of OBDII code P1BBC GMC?

- Extreme temperatures can potentially impact the performance of high voltage batteries in hybrid/electric vehicles, which may contribute to triggering OBDII code P1BBC GMC.

10. How often should I have my hybrid/electric vehicle's high voltage system inspected to prevent OBDII code P1BBC GMC?

- Regular maintenance schedules for hybrid/electric vehicles often include inspections of the high voltage system, so it is advisable to follow the manufacturer's recommendations for optimal performance and to prevent issues like OBDII code P1BBC GMC.