AutoCodes – Buick – P1BE2 Buick

P1BE2 Buick Code - Hybrid/Electric Vehicle Battery 85 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: P1BE2 Buick indicates Hybrid/Electric Vehicle Battery 85 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 777

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BE2 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 P1BE2 Buick - Hybrid/Electric Vehicle Battery 85 Circuit Low Voltage - AutoCodes.com — P1BE2 Buick Code - Hybrid/Electric Vehicle Battery 85 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BE2 Buick?

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

How to Fix the DTC P1BE2 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 P1BE2 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 P1BE2 Buick Code

What does the OBDII code P1BE2 mean on a Buick?

1. The P1BE2 code indicates a "Hybrid/Electric Vehicle Battery 85 Circuit Low Voltage," typically pointing to a voltage issue in the hybrid or EV battery system. 2.

What are the common symptoms of the P1BE2 code in a Buick?

Symptoms may include reduced hybrid or EV performance, warning lights on the dashboard, decreased fuel efficiency, or the vehicle entering limp mode. 3.

What causes the P1BE2 code to appear in a Buick?

This code can be caused by a faulty hybrid battery module, corroded or damaged wiring, a malfunctioning battery control module, or issues within the battery's internal circuitry. 4.

Can I drive my Buick with the P1BE2 code?

While the vehicle may still be drivable, itâ€™s not recommended as it could further damage the hybrid battery system or lead to reduced performance and safety issues. 5.

How is the P1BE2 code diagnosed?

Technicians will use a scan tool to read the code and check for related faults, inspect the hybrid battery and wiring, and perform voltage and continuity tests to pinpoint the issue. 6.

How do you fix the P1BE2 code on a Buick?

Repairs may include replacing the affected hybrid battery module, repairing or replacing damaged wiring, or reprogramming or replacing the battery control module. 7.

How much does it cost to fix the P1BE2 code on a Buick?

Repair costs can vary widely, ranging from $200 for minor wiring repairs to over $2,000 for hybrid battery module replacement. 8.

Can a weak 12V battery cause the P1BE2 code in a Buick?

While rare, a weak 12V battery can sometimes cause voltage-related issues, so itâ€™s worth checking the 12V battery health as part of the diagnosis process. 9.

Will resetting the code fix the P1BE2 issue in a Buick?

Clearing the code without addressing the underlying cause may temporarily turn off the warning light, but the issue will likely return until properly repaired. 10.

Is the P1BE2 code covered under warranty for a Buick hybrid vehicle?

It may be covered under the hybrid battery or emissions warranty, depending on your vehicle's age, mileage, and warranty terms. Check with your dealer for specifics.