AutoCodes – GMC – P1BB2 GMC

P1BB2 GMC Code - Hybrid/Electric Vehicle Battery 69 Circuit Low 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: P1BB2 GMC indicates Hybrid/Electric Vehicle Battery 69 Circuit Low 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 986

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 P1BB2 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 P1BB2 GMC - Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage - AutoCodes.com — P1BB2 GMC Code - Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BB2 GMC?

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

How to Fix the DTC P1BB2 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 P1BB2 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 P1BB2 GMC Code

1. What are the common symptoms of OBDII code P1BB2 GMC (Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage)?

- Common symptoms include reduced power, poor fuel economy, difficulty starting the vehicle, and potential illumination of the check engine light.

2. What are the possible causes of OBDII code P1BB2 GMC (Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage)?

- The code may be triggered by a failing hybrid/electric vehicle battery, loose or corroded battery connections, or issues with the battery management system.

3. How can I diagnose the cause of OBDII code P1BB2 GMC (Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage)?

- Diagnosis typically involves inspecting the hybrid/electric vehicle battery for physical damage, checking battery voltage levels, and using a scan tool to retrieve additional diagnostic trouble codes.

4. Can I continue driving my vehicle with OBDII code P1BB2 GMC (Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage)?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/electric system and potentially leave you stranded.

5. How can I repair OBDII code P1BB2 GMC (Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage)?

- Repair options may include replacing the hybrid/electric vehicle battery, cleaning and tightening battery connections, or addressing any underlying issues with the battery management system.

6. Are there any DIY tips for addressing OBDII code P1BB2 GMC (Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage)?

- DIY tips may include checking and cleaning battery terminals, ensuring proper battery fluid levels (if applicable), and consulting the vehicle's manual for specific troubleshooting steps.

7. What are the potential risks of ignoring OBDII code P1BB2 GMC (Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage)?

- Ignoring this code can lead to increased risk of battery failure, reduced vehicle performance, and potential safety hazards while driving the vehicle.

8. Can a regular mechanic repair OBDII code P1BB2 GMC (Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage)?

- While a regular mechanic may be able to diagnose the issue, repairing this code often requires specialized knowledge and equipment for hybrid/electric vehicle systems.

9. How much does it typically cost to repair OBDII code P1BB2 GMC (Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage)?

- The cost of repair can vary significantly depending on the underlying issue, but it may range from a few hundred to a few thousand dollars, especially if the hybrid/electric vehicle battery needs replacement.

10. How can I prevent OBDII code P1BB2 GMC (Hybrid/Electric Vehicle Battery 69 Circuit Low Voltage) in the future?

- To prevent this code from reoccurring, it's important to maintain the hybrid/electric vehicle battery, perform regular inspections, and address any issues promptly to ensure optimal performance and longevity.