AutoCodes – Generic – P1BB4

P1BB4 Code - Hybrid/Electric Vehicle Battery 70 Circuit Performance

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: P1BB4 indicates Hybrid/Electric Vehicle Battery 70 Circuit Performance.
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 1,619

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 P1BB4 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 P1BB4 - Hybrid/Electric Vehicle Battery 70 Circuit Performance - AutoCodes.com — P1BB4 Code - Hybrid/Electric Vehicle Battery 70 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BB4?

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

How to Fix the DTC P1BB4?

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 P1BB4 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.

Need more information about the P1BB4 code?

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Need Help with the Code?

Get the P1BB4 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BB4 Buick — Hybrid/Electric Vehicle Battery 70 Circuit Performance
P1BB4 Cadillac — Hybrid/Electric Vehicle Battery 70 Circuit Performance
P1BB4 Chevrolet — Hybrid/Electric Vehicle Battery 70 Circuit Performance
P1BB4 GMC — Hybrid/Electric Vehicle Battery 70 Circuit Performance
P1BB4 Saturn — Hybrid/Electric Vehicle Battery 70 Circuit Performance

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 P1BB4 Code

1. What are the common symptoms of OBDII code P1BB4 related to Hybrid/Electric Vehicle Battery 70 Circuit Performance?

- Common symptoms include reduced battery performance, decreased fuel efficiency, and potential issues with the vehicle's hybrid system.

2. What are the possible causes of OBDII code P1BB4 for Hybrid/Electric Vehicle Battery 70 Circuit Performance?

- Causes may include a faulty battery cell, issues with the battery management system, damaged wiring, or problems with the battery control module.

3. How can I diagnose the OBDII code P1BB4 related to Hybrid/Electric Vehicle Battery 70 Circuit Performance?

- Diagnosis typically involves using a diagnostic scanner to read the code, checking the battery health, inspecting wiring for damage, and testing the battery control module.

4. Can I continue driving my vehicle with OBDII code P1BB4 triggered for Hybrid/Electric Vehicle Battery 70 Circuit Performance?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the hybrid system and potentially reduce the vehicle's performance.

5. How can I repair OBDII code P1BB4 for Hybrid/Electric Vehicle Battery 70 Circuit Performance?

- Repairs may involve replacing a faulty battery cell, repairing damaged wiring, recalibrating the battery management system, or replacing the battery control module.

6. Are there any safety precautions to consider when dealing with OBDII code P1BB4 in a Hybrid/Electric Vehicle?

- Safety precautions may include disconnecting the high-voltage system, wearing appropriate protective gear, and following manufacturer guidelines when working on the hybrid system.

7. How do I reset the OBDII code P1BB4 for Hybrid/Electric Vehicle Battery 70 Circuit Performance?

- The code can be reset using a diagnostic scanner capable of clearing fault codes, but it is important to address the underlying issue first to prevent the code from reoccurring.

8. Can a DIY enthusiast without specialized training fix OBDII code P1BB4 for Hybrid/Electric Vehicle Battery 70 Circuit Performance?

- While some basic troubleshooting steps can be taken, it is recommended to seek professional help or consult the vehicle's service manual due to the complexity of hybrid systems.

9. Will OBDII code P1BB4 affect the overall performance of my hybrid or electric vehicle?

- Yes, this code can impact the performance and efficiency of the vehicle's hybrid system, potentially leading to decreased fuel economy and overall drivability issues.

10. How can regular maintenance help prevent OBDII code P1BB4 from occurring in my Hybrid/Electric Vehicle?

- Regular maintenance, such as checking and servicing the battery, monitoring the hybrid system, and addressing any warning lights promptly, can help prevent issues that trigger this code.