AutoCodes – GMC – P0BBB GMC

P0BBB GMC Code - Hybrid/Electric Vehicle Battery 26 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: P0BBB GMC indicates Hybrid/Electric Vehicle Battery 26 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 968

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 P0BBB 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 P0BBB GMC - Hybrid/Electric Vehicle Battery 26 Circuit High Voltage - AutoCodes.com — P0BBB GMC Code - Hybrid/Electric Vehicle Battery 26 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0BBB GMC?

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

How to Fix the DTC P0BBB 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 P0BBB 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 P0BBB GMC Code

1. What are common symptoms of OBDII code P0BBB GMC related to the Hybrid/Electric Vehicle Battery 26 Circuit High Voltage issue?

- Common symptoms may include illuminated check engine light, reduced vehicle performance, and potential issues with the hybrid/electric powertrain.

2. What are the possible causes of OBDII code P0BBB GMC indicating Hybrid/Electric Vehicle Battery 26 Circuit High Voltage?

- Possible causes can include damaged wiring, faulty connectors, issues with the hybrid/electric battery pack, or problems with the high voltage circuit components.

3. How can I diagnose the Hybrid/Electric Vehicle Battery 26 Circuit High Voltage issue associated with OBDII code P0BBB GMC?

- Diagnosis typically involves using a scan tool to retrieve the code, inspecting the high voltage circuit components, checking for damaged wiring or connectors, and testing the hybrid/electric battery pack.

4. Is it safe to drive my vehicle with OBDII code P0BBB GMC triggered by the Hybrid/Electric Vehicle Battery 26 Circuit High Voltage problem?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the hybrid/electric system and potentially pose safety risks due to the high voltage nature of the issue.

5. What are some repair tips for addressing OBDII code P0BBB GMC related to the Hybrid/Electric Vehicle Battery 26 Circuit High Voltage issue?

- Repair tips may include inspecting and repairing damaged wiring, replacing faulty connectors, testing and potentially replacing high voltage circuit components, and ensuring the hybrid/electric system is functioning correctly.

6. Can I reset the OBDII code P0BBB GMC myself after addressing the Hybrid/Electric Vehicle Battery 26 Circuit High Voltage problem?

- Once the underlying issue causing the code is fixed, the code can typically be cleared using an OBDII scan tool or by disconnecting the vehicle's battery for a short period to reset the system.

7. How critical is it to address OBDII code P0BBB GMC associated with the Hybrid/Electric Vehicle Battery 26 Circuit High Voltage issue promptly?

- It is important to address this code promptly to prevent further damage to the hybrid/electric system and ensure the vehicle operates safely and efficiently.

8. Are there any precautions to take when working on the Hybrid/Electric Vehicle Battery 26 Circuit High Voltage issue triggering OBDII code P0BBB GMC?

- It is crucial to follow safety protocols for working with high voltage systems, such as wearing appropriate personal protective equipment and ensuring the vehicle's power is fully disconnected before beginning any repairs.

9. Can a DIY enthusiast with automotive experience fix the Hybrid/Electric Vehicle Battery 26 Circuit High Voltage problem causing OBDII code P0BBB GMC?

- While some experienced individuals may be able to diagnose and repair this issue, working on high voltage systems should be approached with caution, and professional assistance may be recommended to ensure safety and proper repairs.

10. How can regular maintenance help prevent OBDII code P0BBB GMC related to the Hybrid/Electric Vehicle Battery 26 Circuit High Voltage issue?

- Regular maintenance, including inspection of high voltage components, monitoring the hybrid/electric system's performance, and addressing any issues promptly, can help prevent the occurrence of this code and ensure the vehicle's overall health.