AutoCodes – Buick – P0B90 Buick

P0B90 Buick Code - Hybrid/Electric Vehicle Battery 18 Circuit

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: P0B90 Buick indicates Hybrid/Electric Vehicle Battery 18 Circuit.
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 883

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 P0B90 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 P0B90 Buick - Hybrid/Electric Vehicle Battery 18 Circuit - AutoCodes.com — P0B90 Buick Code - Hybrid/Electric Vehicle Battery 18 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B90 Buick?

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

How to Fix the DTC P0B90 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 P0B90 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 P0B90 Buick Code

1. What are the common symptoms of OBDII code P0B90 in a Buick Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid/electric vehicle performance, decreased fuel efficiency, and the activation of the Check Engine Light.

2. What does the OBDII code P0B90 indicate in a Buick Hybrid/Electric Vehicle?

- OBDII code P0B90 specifically refers to an issue with the Hybrid/Electric Vehicle Battery 18 Circuit in a Buick.

3. What are the possible causes of OBDII code P0B90 in a Buick Hybrid/Electric Vehicle?

- Possible causes of this code include a faulty battery 18 circuit, damaged wiring, loose connections, or issues with the battery control module.

4. How can I diagnose the OBDII code P0B90 in my Buick Hybrid/Electric Vehicle?

- Diagnosis involves using a diagnostic scanner to retrieve the code, inspecting the battery 18 circuit components, checking for loose connections, and testing the battery control module.

5. Can I still drive my Buick Hybrid/Electric Vehicle with OBDII code P0B90 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage and reduced performance.

6. How can I repair OBDII code P0B90 in my Buick Hybrid/Electric Vehicle?

- Repairing this code may involve repairing or replacing the battery 18 circuit components, addressing wiring issues, securing connections, or reprogramming the battery control module.

7. Is it safe to reset the Check Engine Light after fixing OBDII code P0B90 in my Buick Hybrid/Electric Vehicle?

- Yes, it is safe to reset the Check Engine Light after fixing the issue, but it's important to ensure that the underlying problem causing the code has been successfully resolved.

8. How much does it typically cost to repair OBDII code P0B90 in a Buick Hybrid/Electric Vehicle?

- The cost of repair can vary depending on the exact cause of the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can I prevent OBDII code P0B90 from occurring in my Buick Hybrid/Electric Vehicle?

- Regular maintenance, such as checking the battery system, keeping connections secure, and addressing any warning signs promptly, can help prevent this code from occurring.