AutoCodes – Buick – P1B64 Buick

P1B64 Buick Code - Hybrid/Electric Vehicle Battery 43 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: P1B64 Buick indicates Hybrid/Electric Vehicle Battery 43 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 944

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 P1B64 Buick 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 P1B64 Buick - Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage - AutoCodes.com — P1B64 Buick Code - Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B64 Buick?

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

How to Fix the DTC P1B64 Buick?

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 P1B64 Buick 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 P1B64 Buick Code

1. What are the common symptoms of OBDII code P1B64 in a Buick Hybrid/Electric Vehicle?

- Common symptoms include reduced electric vehicle range, poor performance, and potential difficulty starting the vehicle.

2. What can cause the Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage code P1B64 in a Buick?

- Possible causes include a failing hybrid/electric vehicle battery, issues with the battery management system, or problems with the charging system.

3. How can I diagnose the OBDII code P1B64 in my Buick Hybrid/Electric Vehicle?

- Proper diagnosis typically involves using a professional OBDII scanner to read the code, checking the hybrid/electric battery health, and inspecting the charging system components.

4. Is it safe to continue driving my Buick when the P1B64 code is present?

- It is not recommended to drive the vehicle when this code is present, as it can lead to further damage to the hybrid/electric components and potentially pose safety risks.

5. Can I reset the OBDII code P1B64 in my Buick Hybrid/Electric Vehicle myself?

- While you can clear the code using an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

6. Are there any DIY repair tips for fixing the Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage code in my Buick?

- DIY repairs for this code are not recommended due to the complexity of hybrid/electric vehicle systems. It is best to consult a professional technician for proper diagnosis and repair.

7. How much does it typically cost to repair OBDII code P1B64 in a Buick Hybrid/Electric Vehicle?

- Repair costs can vary based on the exact cause of the code, but it may involve replacing the hybrid/electric vehicle battery, battery management system components, or charging system parts, which can be expensive.

8. Can a low 12-volt battery cause the P1B64 code to appear in my Buick Hybrid/Electric Vehicle?

- Yes, a weak or failing 12-volt battery can sometimes trigger this code due to its impact on the overall electrical system of the vehicle.

9. Will driving my Buick Hybrid/Electric Vehicle with the P1B64 code damage other components?

- Continuing to drive with this code present can potentially cause further damage to the hybrid/electric system, leading to more costly repairs down the line.

10. How often should I have my Buick Hybrid/Electric Vehicle's battery system inspected to prevent OBDII code P1B64 from appearing?

- Regular maintenance and battery system checks, as recommended by the manufacturer, can help prevent issues that may trigger the P1B64 code and ensure the overall health of the hybrid/electric components.