AutoCodes – Buick – P0B89 Buick

P0B89 Buick Code - Hybrid/Electric Vehicle Battery 16 Circuit High 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: P0B89 Buick indicates Hybrid/Electric Vehicle Battery 16 Circuit High 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 909

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B89 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 P0B89 Buick - Hybrid/Electric Vehicle Battery 16 Circuit High Voltage - AutoCodes.com — P0B89 Buick Code - Hybrid/Electric Vehicle Battery 16 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B89 Buick?

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

How to Fix the DTC P0B89 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 P0B89 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 P0B89 Buick Code

1. What are some common symptoms of OBDII code P0B89 in a Buick Hybrid/Electric Vehicle?

- Some common symptoms include the check engine light illuminating, reduced hybrid system performance, and potential issues with the high voltage battery system.

2. What could cause the OBDII code P0B89 to appear in a Buick Hybrid/Electric Vehicle?

- The code may be triggered by a fault in the Hybrid/Electric Vehicle Battery 16 Circuit High Voltage, such as a wiring issue, a faulty battery cell, or a problem with the battery management system.

3. How can I diagnose the OBDII code P0B89 in my Buick Hybrid/Electric Vehicle?

- Diagnosing this code typically requires specialized diagnostic equipment to scan the hybrid system for specific fault codes and perform voltage tests on the high voltage battery components.

4. Can I still drive my Buick Hybrid/Electric Vehicle with the OBDII code P0B89 present?

- It is not recommended to drive the vehicle with this code present, as it can indicate potential issues with the high voltage system that may impact safety and performance.

5. What repairs are typically needed to fix the OBDII code P0B89 in a Buick Hybrid/Electric Vehicle?

- Repairing this code often involves identifying and addressing the root cause of the high voltage circuit issue, which may require replacing damaged wiring, repairing faulty battery cells, or recalibrating the battery management system.

6. Is it safe to attempt DIY repairs for the OBDII code P0B89 in a Buick Hybrid/Electric Vehicle?

- Due to the high voltage nature of the system involved, it is recommended to have repairs for this code performed by a qualified technician with experience working on hybrid/electric vehicles.

7. How much does it typically cost to repair the OBDII code P0B89 in a Buick Hybrid/Electric Vehicle?

- Repair costs can vary depending on the specific underlying issue causing the code, but it is advisable to budget for potential expenses related to diagnosing and repairing high voltage system components.

8. Can resetting the check engine light clear the OBDII code P0B89 in a Buick Hybrid/Electric Vehicle?

- While clearing the check engine light may temporarily hide the code, it will not fix the underlying issue causing the fault code to appear. It is essential to diagnose and address the root cause of the problem.

9. How often does the OBDII code P0B89 reoccur in Buick Hybrid/Electric Vehicles after repair?

- The recurrence of this code can vary depending on the quality of the repair work done and the overall health of the high voltage battery system. Regular maintenance and monitoring are recommended to prevent future occurrences.

10. Are there any preventative measures I can take to avoid the OBDII code P0B89 in my Buick Hybrid/Electric Vehicle?

- Regularly scheduled maintenance, such as checking the high voltage system components for signs of wear or damage, can help prevent issues that may lead to the appearance of this fault code.