AutoCodes – Generic – P1B64

P1B64 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 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 1,914

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

What does this mean?

What are the Possible Causes of the DTC P1B64?

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

How to Fix the DTC P1B64?

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 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 P1B64 code?

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Need Help with the Code?

Get the P1B64 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1B64 Buick — Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage
P1B64 Cadillac — Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage
P1B64 Chevrolet — Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage
P1B64 GMC — Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage
P1B64 Saturn — Hybrid/Electric Vehicle Battery 43 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 P1B64 Code

1. What are common symptoms of OBDII code P1B64 (Hybrid/Electric Vehicle Battery 43 Circuit Low Voltage)?

- Common symptoms include reduced power, poor fuel economy, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1B64?

- The code P1B64 may be triggered by a weak or failing hybrid/electric vehicle battery, faulty battery sensor, or issues with the battery management system.

3. How can I diagnose the cause of OBDII code P1B64?

- To diagnose the issue, it is recommended to perform a thorough inspection of the hybrid/electric vehicle battery, check the battery sensor, and scan the battery management system for any faults.

4. What are some repair tips for addressing OBDII code P1B64?

- Repair tips may include testing and replacing the hybrid/electric vehicle battery if necessary, inspecting and replacing the battery sensor, and resetting the battery management system.

5. Can OBDII code P1B64 be cleared/reset without fixing the underlying issue?

- While you can clear the code temporarily, it is important to address the underlying issue causing the code to prevent further damage to the vehicle's hybrid/electric system.

6. Is it safe to continue driving with OBDII code P1B64 present?

- It is not recommended to continue driving with OBDII code P1B64 present, as it can lead to further damage to the hybrid/electric vehicle system and compromise vehicle performance and safety.

7. What are the potential risks of ignoring OBDII code P1B64?

- Ignoring the code can result in decreased fuel efficiency, loss of power, and potential damage to the hybrid/electric vehicle battery, leading to more costly repairs in the future.

8. Are there any preventive maintenance measures to avoid OBDII code P1B64?

- Regularly checking the condition of the hybrid/electric vehicle battery, monitoring battery performance, and following manufacturer-recommended maintenance schedules can help prevent OBDII code P1B64.

9. Can a DIY enthusiast repair OBDII code P1B64, or is professional assistance recommended?

- While some basic inspections can be done by a DIY enthusiast, diagnosing and repairing OBDII code P1B64 related to the hybrid/electric system may require specialized tools and expertise, so professional assistance is often recommended.

10. How much does it typically cost to repair OBDII code P1B64 in a hybrid/electric vehicle?

- The cost of repairing OBDII code P1B64 can vary depending on the underlying issue, but it may involve battery testing or replacement, sensor diagnostics, and system resets, with costs ranging from a few hundred to over a thousand dollars.