AutoCodes – Buick – P0B92 Buick

P0B92 Buick Code - Hybrid/Electric Vehicle Battery 18 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: P0B92 Buick indicates Hybrid/Electric Vehicle Battery 18 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 945

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 P0B92 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 P0B92 Buick - Hybrid/Electric Vehicle Battery 18 Circuit Low Voltage - AutoCodes.com — P0B92 Buick Code - Hybrid/Electric Vehicle Battery 18 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0B92 Buick?

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

How to Fix the DTC P0B92 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 P0B92 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 P0B92 Buick Code

What does OBDII code P0B92 mean for a Buick?

Code P0B92 indicates a low voltage issue in the circuit associated with battery 18 of the hybrid/electric vehicle battery system.

What are the common symptoms of code P0B92 in a Buick?

Symptoms may include a check engine light, reduced fuel efficiency, diminished hybrid system performance, or the vehicle entering limp mode.

What causes code P0B92 to appear in a Buick?

Common causes include a faulty hybrid battery module, poor electrical connections, corroded terminals, or issues with the battery management system.

Can I drive my Buick with code P0B92?

Driving with this code is not recommended as it can lead to further damage to the hybrid system and reduced vehicle performance.

How do I diagnose code P0B92 on my Buick?

Diagnosis involves inspecting the hybrid battery module, checking for damaged wiring or connectors, and using a scan tool to monitor voltage readings in the affected circuit.

What tools are needed to troubleshoot code P0B92?

Youâ€™ll need a diagnostic scan tool capable of interfacing with hybrid systems, a multimeter for voltage checks, and access to the vehicleâ€™s wiring diagrams.

How is code P0B92 fixed in a Buick?

Repairs may include replacing the faulty battery module, repairing damaged wiring, cleaning corroded terminals, or reprogramming the battery management system.

How much does it cost to fix code P0B92 on a Buick?

Repair costs can vary but may range from $500 to $3,000 depending on whether the issue is a minor wiring repair or a full hybrid battery module replacement.

Can a weak 12V battery cause code P0B92?

While unlikely, a weak 12V battery can indirectly affect the hybrid system. Itâ€™s important to ensure the 12V battery is in good condition during diagnosis.

Does code P0B92 mean I need a new hybrid battery?

Not necessarily. The problem could be with a single module, wiring, or the battery management system. Proper diagnosis is essential before replacing the hybrid battery.