AutoCodes – Buick – P0B64 Buick

P0B64 Buick Code - Hybrid/Electric Vehicle Battery 9 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: P0B64 Buick indicates Hybrid/Electric Vehicle Battery 9 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 765

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B64 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 P0B64 Buick - Hybrid/Electric Vehicle Battery 9 Circuit Performance - AutoCodes.com — P0B64 Buick Code - Hybrid/Electric Vehicle Battery 9 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P0B64 Buick?

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

How to Fix the DTC P0B64 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 P0B64 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 P0B64 Buick Code

1. What does the OBDII code P0B64 mean on a Buick?

P0B64 indicates an issue with the performance of Hybrid/Electric Vehicle Battery 9 Circuit, often pointing to a problem in the battery pack's specific cell or module.

2. What are the common symptoms of the P0B64 code in a Buick?

Symptoms may include a check engine light, reduced fuel efficiency, limited power mode, or noticeable changes in the hybrid system's performance.

3. What causes the P0B64 code to trigger?

Common causes include a faulty battery cell/module, wiring or connection issues, a malfunctioning battery control module, or excessive corrosion in the circuit.

4. Can I drive my Buick with the P0B64 code?

While the vehicle may still be drivable, ignoring the issue can lead to reduced performance and potential damage to the hybrid system.

5. How do I diagnose the P0B64 code on my Buick?

Diagnosis involves using a scan tool to check for related codes, inspecting battery connections, and testing the voltage and resistance of the affected circuit.

6. How can I fix the P0B64 code in my Buick?

Repairs may include replacing the faulty battery module, cleaning or repairing corroded connections, or updating/reflashing the battery control module.

7. How much does it cost to repair a P0B64 code?

Repair costs vary depending on the issue but can range from $200 to $2,000, especially if the hybrid battery module needs replacement.

8. Can a dead 12V auxiliary battery cause the P0B64 code?

No, the P0B64 code specifically relates to the high-voltage hybrid battery system and not the 12V auxiliary battery.

9. How can I prevent the P0B64 code from recurring?

Regular maintenance of the hybrid battery, keeping connections clean, and addressing hybrid system issues promptly can help prevent the code from recurring.

10. Does the P0B64 code require professional repair?

While some basic checks can be done at home, diagnosing and repairing hybrid battery circuits often requires specialized tools and expertise, so professional repair is recommended.