AutoCodes – Buick – P1E57 Buick

P1E57 Buick Code - Hybrid/Electric Vehicle Battery 44 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: P1E57 Buick indicates Hybrid/Electric Vehicle Battery 44 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 739

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 P1E57 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 P1E57 Buick - Hybrid/Electric Vehicle Battery 44 Circuit - AutoCodes.com — P1E57 Buick Code - Hybrid/Electric Vehicle Battery 44 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E57 Buick?

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

How to Fix the DTC P1E57 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 P1E57 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 P1E57 Buick Code

1. What does OBDII code P1E57 mean on a Buick?

Code P1E57 indicates an issue with the Hybrid/Electric Vehicle Battery 44 Circuit, which typically points to a fault in the high-voltage battery system or its wiring.

2. What are the common symptoms of code P1E57 on a Buick?

Symptoms may include reduced fuel economy, limited hybrid or electric operation, warning lights on the dashboard, or decreased overall vehicle performance.

3. What causes code P1E57 on a Buick?

The code can be caused by faulty wiring or connectors in the battery circuit, a malfunctioning battery control module, or damage to the high-voltage battery itself.

4. Can I still drive my Buick with code P1E57?

While it may still be drivable, the vehicle's performance and efficiency may be compromised. Prolonged driving without addressing the issue could lead to further damage.

5. How do technicians diagnose code P1E57 on a Buick?

Technicians typically use a diagnostic scanner to retrieve trouble codes, inspect the high-voltage battery and its wiring for damage, and test the battery control module for functionality.

6. What repairs are needed to fix code P1E57 on a Buick?

Repairs may include replacing damaged wiring, repairing or replacing the battery control module, or servicing the high-voltage battery.

7. Is code P1E57 specific to Buickâ€™s hybrid or electric vehicles?

Yes, this code is specific to Buick models equipped with hybrid or electric vehicle systems that use high-voltage batteries.

8. How much does it cost to fix code P1E57 on a Buick?

Repair costs vary widely depending on the specific issue, ranging from a few hundred dollars for wiring repairs to several thousand dollars for high-voltage battery replacement.

9. Can a dead 12-volt battery cause code P1E57 on a Buick?

A weak or dead 12-volt battery can sometimes contribute to hybrid system malfunctions, but the code typically relates to the high-voltage battery circuit itself.

10. Do I need a dealership to repair code P1E57 on my Buick?

While dealerships have specialized tools and training for hybrid systems, qualified independent shops with experience in electric vehicles may also be able to perform the repair.