AutoCodes – Buick – P1B6A Buick

P1B6A Buick Code - Hybrid/Electric Vehicle Battery 45 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: P1B6A Buick indicates Hybrid/Electric Vehicle Battery 45 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 881

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1B6A 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 P1B6A Buick - Hybrid/Electric Vehicle Battery 45 Circuit Low Voltage - AutoCodes.com — P1B6A Buick Code - Hybrid/Electric Vehicle Battery 45 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B6A Buick?

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

How to Fix the DTC P1B6A 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 P1B6A 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.

Need more information about the P1B6A Buick code?

Need more information on how to fix the P1B6A Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B6A Buick code diagnosed by a professional: Find a repair shop in your area

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 P1B6A Buick Code

1. What are the common symptoms of OBDII code P1B6A in a Buick Hybrid/Electric Vehicle?

- Common symptoms include poor fuel efficiency, loss of power, and a warning light illuminated on the dashboard.

2. What does the OBDII code P1B6A Buick Hybrid/Electric Vehicle Battery 45 Circuit Low Voltage indicate?

- This code indicates that there is a low voltage condition in the circuit related to the hybrid/electric vehicle battery.

3. What are the possible causes of the OBDII code P1B6A in a Buick Hybrid/Electric Vehicle?

- Possible causes include a faulty battery pack, damaged wiring, a malfunctioning battery management system, or a problem with the hybrid system control module.

4. How can I diagnose the OBDII code P1B6A on my Buick Hybrid/Electric Vehicle?

- A thorough diagnosis should involve checking the battery pack voltage, inspecting the wiring for any damage, and using a diagnostic scan tool to retrieve specific fault codes.

5. Can I drive my Buick Hybrid/Electric Vehicle with the OBDII code P1B6A present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid/electric system.

6. How can I repair the low voltage issue indicated by the OBDII code P1B6A in my Buick Hybrid/Electric Vehicle?

- Repairing this issue may involve replacing the battery pack, repairing or replacing damaged wiring, or reprogramming the battery management system.

7. Is it possible to reset the OBDII code P1B6A in a Buick Hybrid/Electric Vehicle without repairs?

- While you can clear the code with a diagnostic scan tool, it is important to address the underlying issue causing the low voltage condition to prevent further problems.

8. How can regular maintenance help prevent the OBDII code P1B6A from appearing in my Buick Hybrid/Electric Vehicle?

- Regularly inspecting the battery pack, checking the wiring for damage, and following the manufacturer's maintenance schedule can help prevent issues leading to this fault code.

9. Can extreme temperatures affect the likelihood of triggering the OBDII code P1B6A in a Buick Hybrid/Electric Vehicle?

- Yes, extreme temperatures can impact the performance of the hybrid/electric system components, potentially leading to low voltage conditions triggering this fault code.

10. Should I seek professional help to diagnose and repair the OBDII code P1B6A in my Buick Hybrid/Electric Vehicle?

- Yes, it is advisable to seek assistance from a qualified technician or dealership with experience in hybrid/electric vehicle systems to accurately diagnose and repair the issue indicated by this fault code.