AutoCodes – Buick – P1B6D Buick

P1B6D Buick Code - Hybrid/Electric Vehicle Battery 46 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: P1B6D Buick indicates Hybrid/Electric Vehicle Battery 46 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 798

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 P1B6D 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 P1B6D Buick - Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage - AutoCodes.com — P1B6D Buick Code - Hybrid/Electric Vehicle Battery 46 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B6D Buick?

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

How to Fix the DTC P1B6D 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 P1B6D 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 P1B6D Buick Code

1. What are the common symptoms of OBDII code P1B6D in a Buick hybrid/electric vehicle?

- Common symptoms include poor fuel efficiency, reduced power, difficulty starting the vehicle, and the illumination of the check engine light.

2. What can cause the OBDII code P1B6D in a Buick hybrid/electric vehicle?

- The code P1B6D typically indicates a low voltage condition in the hybrid/electric vehicle battery 46 circuit, which can be caused by a faulty battery cell, damaged wiring, or a malfunctioning battery management system.

3. How serious is the OBDII code P1B6D in a Buick hybrid/electric vehicle?

- The code P1B6D should be addressed promptly as it can lead to poor vehicle performance and potential damage to the hybrid/electric vehicle battery if left unresolved.

4. Can I continue driving my Buick hybrid/electric vehicle with the OBDII code P1B6D?

- It is not recommended to continue driving the vehicle with the code P1B6D present, as it can result in further damage to the battery and other components.

5. How can I diagnose and repair the OBDII code P1B6D in my Buick hybrid/electric vehicle?

- Diagnosing and repairing the code P1B6D requires specialized diagnostic equipment to test the battery, wiring, and battery management system. It is recommended to consult a qualified technician familiar with hybrid/electric vehicle systems.

6. Is it safe to attempt DIY repairs for the OBDII code P1B6D in a Buick hybrid/electric vehicle?

- Due to the complexity of hybrid/electric vehicle systems and the high voltage components involved, it is not recommended for inexperienced individuals to attempt DIY repairs for the code P1B6D. Seek professional assistance for proper diagnosis and repair.

7. How much does it cost to fix the OBDII code P1B6D in a Buick hybrid/electric vehicle?

- The cost of fixing the code P1B6D can vary depending on the exact cause of the issue. It may involve repairing or replacing battery components, wiring, or the battery management system, which can range from a few hundred to a few thousand dollars.

8. Can a low-quality or aftermarket hybrid/electric vehicle battery cause the OBDII code P1B6D in a Buick?

- Using a low-quality or aftermarket hybrid/electric vehicle battery can potentially lead to issues like the code P1B6D due to improper voltage regulation or compatibility issues. It is recommended to use OEM-approved components for such vehicles.

9. How often does the OBDII code P1B6D occur in Buick hybrid/electric vehicles?

- The occurrence of the code P1B6D in Buick hybrid/electric vehicles can vary, but it is relatively uncommon compared to other more generic OBDII codes. Proper maintenance and care of the vehicle's battery system can help prevent such issues.

10. Can extreme weather conditions impact the likelihood of encountering the OBDII code P1B6D in a Buick hybrid/electric vehicle?

- Extreme weather conditions, such as extreme heat or cold, can potentially affect the performance and health of the hybrid/electric vehicle battery, which may increase the chances of encountering issues like the code P1B6D. It is important to monitor the battery's condition in such conditions.