AutoCodes – Buick – P1E03 Buick

P1E03 Buick Code - Hybrid/Electric Vehicle Battery 95 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: P1E03 Buick indicates Hybrid/Electric Vehicle Battery 95 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 1,166

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 Apr 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E03 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 P1E03 Buick - Hybrid/Electric Vehicle Battery 95 Circuit High Voltage - AutoCodes.com — P1E03 Buick Code - Hybrid/Electric Vehicle Battery 95 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1E03 Buick?

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

How to Fix the DTC P1E03 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 P1E03 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 P1E03 Buick Code

1. What are the common symptoms of OBDII code P1E03 in a Buick Hybrid/Electric Vehicle?

- Common symptoms include a warning light on the dashboard, reduced vehicle performance, and potential issues with the hybrid/electric battery system.

2. What could cause the OBDII code P1E03 (Hybrid/Electric Vehicle Battery 95 Circuit High Voltage) in a Buick?

- This code is typically triggered by a high voltage reading detected in the hybrid/electric vehicle battery system, which could be caused by a faulty battery pack, damaged wiring, or a malfunctioning battery management system.

3. How serious is the OBDII code P1E03 in a Buick Hybrid/Electric Vehicle?

- This code indicates a potential high voltage issue in the vehicle's battery system, which can be a serious safety concern. It is important to address this code promptly to prevent further damage and ensure safe operation of the vehicle.

4. Can I continue driving my Buick with the OBDII code P1E03 present?

- It is not recommended to continue driving the vehicle with this code present, as it could lead to further damage to the battery system or other components. It is best to have the issue diagnosed and repaired by a professional as soon as possible.

5. How can I diagnose and repair the OBDII code P1E03 in my Buick Hybrid/Electric Vehicle?

- Diagnosing and repairing this code requires specialized equipment and knowledge of hybrid/electric vehicle systems. It is recommended to take your vehicle to a qualified technician or dealership for proper diagnosis and repair.

6. Is it safe to attempt DIY repairs for the OBDII code P1E03 in a Buick Hybrid/Electric Vehicle?

- Due to the high voltage nature of the hybrid/electric vehicle battery system, it is not safe to attempt DIY repairs for this code unless you have the proper training and equipment. Always seek professional help for issues related to the battery system.

7. How much does it typically cost to repair the OBDII code P1E03 in a Buick Hybrid/Electric Vehicle?

- The cost of repairing this code can vary depending on the root cause of the issue and the extent of the damage. It is advisable to get a diagnostic assessment from a professional to determine the exact cost of repairs.

8. Can the OBDII code P1E03 be a recurring issue in a Buick Hybrid/Electric Vehicle?

- If the root cause of the code is not properly addressed, it can potentially recur. Regular maintenance and proper care of the hybrid/electric vehicle system can help prevent the code from reappearing.