AutoCodes – Generic – P1BB8

P1BB8 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 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 1,075

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

What does this mean?

What are the Possible Causes of the DTC P1BB8?

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

How to Fix the DTC P1BB8?

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 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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Information for Specific Makes

P1BB8 Buick — Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage
P1BB8 Cadillac — Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage
P1BB8 Chevrolet — Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage
P1BB8 GMC — Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage
P1BB8 Saturn — Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage

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 Code

1. What are the common symptoms of OBDII code P1BB8 (Hybrid/Electric Vehicle Battery 71 Circuit Low Voltage)?

- Common symptoms include poor fuel efficiency, reduced power, and potential failure to start in hybrid/electric vehicles.

2. What are the possible causes of OBDII code P1BB8?

- The code P1BB8 can be triggered by issues such as a faulty battery pack, damaged wiring, loose connections, or a malfunctioning battery management system.

3. How can I diagnose the source of OBDII code P1BB8?

- Diagnosis typically involves using a diagnostic scan tool to check the battery voltage levels, inspecting the battery pack and related components for damage, and testing the wiring and connections for continuity.

4. Can OBDII code P1BB8 be reset without addressing the underlying issue?

- While the code can be cleared temporarily, it is important to address the root cause to prevent recurring issues and potential damage to the hybrid/electric vehicle's battery system.

5. What are some repair tips for resolving OBDII code P1BB8?

- Repair tips may include checking and tightening connections, replacing damaged wiring, testing and possibly replacing the battery pack, and ensuring proper functioning of the battery management system.

6. Is it safe to continue driving with OBDII code P1BB8 present?

- It is not recommended to drive with the code P1BB8 active, as it can lead to further damage to the battery system and potentially result in a breakdown or safety hazards.

7. Can OBDII code P1BB8 be caused by a simple battery drain issue?

- Yes, excessive battery drain can contribute to triggering code P1BB8, so it is important to check for parasitic draws or other sources of battery drain in the vehicle.

8. Are there any recalls or technical service bulletins related to OBDII code P1BB8?

- It is advisable to check with the vehicle manufacturer or authorized service centers for any recalls or technical bulletins related to code P1BB8 in specific hybrid/electric vehicle models.

9. How can regular maintenance help prevent OBDII code P1BB8 from occurring?

- Regular maintenance, including proper charging practices, monitoring battery health, and addressing any warning signs promptly, can help prevent issues leading to code P1BB8 in hybrid/electric vehicles.

10. What is the typical cost of repairing OBDII code P1BB8 in a hybrid/electric vehicle?

- The cost of repairing code P1BB8 can vary depending on the specific issue, parts needed, labor costs, and dealership or repair shop rates, so it is advisable to obtain a diagnosis and estimate from a qualified technician.