AutoCodes – Chevrolet – P1BB8 Chevrolet

P1BB8 Chevrolet Code - Hybrid/Electric Vehicle Battery 71 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: P1BB8 Chevrolet indicates Hybrid/Electric Vehicle Battery 71 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 1,036

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 P1BB8 Chevrolet 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 P1BB8 Chevrolet - Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage - AutoCodes.com — P1BB8 Chevrolet Code - Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BB8 Chevrolet?

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

How to Fix the DTC P1BB8 Chevrolet?

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 P1BB8 Chevrolet 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 P1BB8 Chevrolet Code

1. What are the common symptoms of OBDII code P1BB8 in a Chevrolet hybrid/electric vehicle?

- Common symptoms include reduced electric drive range, poor vehicle performance, and warning lights on the dashboard related to the battery system.

2. What can cause the OBDII code P1BB8 to trigger in a Chevrolet hybrid/electric vehicle?

- This code is typically triggered by low voltage in the hybrid/electric vehicle battery 71 circuit, which may be caused by a failing battery cell, faulty wiring connections, or a problem with the battery management system.

3. How can I diagnose the root cause of OBDII code P1BB8 in my Chevrolet hybrid/electric vehicle?

- Diagnosing this code usually involves using a scan tool to check the battery voltage levels, inspecting the battery pack for physical damage, and testing the wiring connections for continuity and proper voltage flow.

4. Is it safe to continue driving my Chevrolet hybrid/electric vehicle with OBDII code P1BB8 present?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage to the battery system and potentially compromise the vehicle's performance and safety.

5. Can I reset the OBDII code P1BB8 in my Chevrolet hybrid/electric vehicle by disconnecting the battery?

- While disconnecting the battery may temporarily clear the code, it is important to address the underlying issue causing the low voltage condition to prevent the code from reoccurring.

6. Are there any common DIY repair tips for addressing OBDII code P1BB8 in a Chevrolet hybrid/electric vehicle?

- DIY repair tips may include checking and tightening the battery connections, inspecting the battery pack for visible damage, and ensuring the battery cooling system is functioning properly.

7. Do I need specialized equipment to repair OBDII code P1BB8 in my Chevrolet hybrid/electric vehicle?

- Repairing this code may require specialized equipment such as a scan tool capable of reading hybrid/electric vehicle codes, as well as knowledge of high-voltage safety procedures when working on the battery system.

8. Can a failing hybrid/electric vehicle battery be the sole cause of OBDII code P1BB8 in a Chevrolet?

- Yes, a failing battery cell or overall battery pack degradation can lead to low voltage in circuit 71, triggering the OBDII code P1BB8 in a Chevrolet hybrid/electric vehicle.

9. How much does it typically cost to repair OBDII code P1BB8 in a Chevrolet hybrid/electric vehicle?

- The cost of repairing this code can vary depending on the root cause, but it may involve battery cell replacement, wiring repairs, or recalibration of the battery management system, which can range from a few hundred to a few thousand dollars.

10. Are there any recalls or service bulletins related to OBDII code P1BB8 in Chevrolet hybrid/electric vehicles?

- It is recommended to check with Chevrolet dealerships or online resources for any recalls or service bulletins related to OBDII code P1BB8 to see if there are known issues or solutions provided by the manufacturer.