AutoCodes – Generic – P1E03

P1E03 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 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 4,993

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 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 - Hybrid/Electric Vehicle Battery 95 Circuit High Voltage - AutoCodes.com — P1E03 Code - Hybrid/Electric Vehicle Battery 95 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1E03?

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

How to Fix the DTC P1E03?

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 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.

Need more information about the P1E03 code?

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Need Help with the Code?

Get the P1E03 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1E03 Buick — Hybrid/Electric Vehicle Battery 95 Circuit High Voltage
P1E03 Cadillac — Hybrid/Electric Vehicle Battery 95 Circuit High Voltage
P1E03 Chevrolet — Hybrid/Electric Vehicle Battery 95 Circuit High Voltage
P1E03 GMC — Hybrid/Electric Vehicle Battery 95 Circuit High Voltage
P1E03 Saturn — Hybrid/Electric Vehicle Battery 95 Circuit High Voltage

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 Code

1. What are the common symptoms of OBDII code P1E03 (Hybrid/Electric Vehicle Battery 95 Circuit High Voltage)?

The common symptoms of this code may include poor fuel efficiency, reduced hybrid system performance, and potential battery issues.

2. What are the possible causes of OBDII code P1E03 (Hybrid/Electric Vehicle Battery 95 Circuit High Voltage)?

Possible causes of this code include a faulty battery pack, issues with the battery management system, or problems with high voltage wiring.

3. How serious is OBDII code P1E03 (Hybrid/Electric Vehicle Battery 95 Circuit High Voltage)?

This code should be addressed promptly as it can impact the overall performance and safety of the hybrid/electric vehicle.

4. Can I continue driving my vehicle with OBDII code P1E03 (Hybrid/Electric Vehicle Battery 95 Circuit High Voltage)?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid system.

5. How can I diagnose OBDII code P1E03 (Hybrid/Electric Vehicle Battery 95 Circuit High Voltage)?

Diagnosing this code typically requires the use of a professional OBDII scanner to read the specific fault codes and pinpoint the issue within the hybrid system.

6. What are some repair tips for addressing OBDII code P1E03 (Hybrid/Electric Vehicle Battery 95 Circuit High Voltage)?

Repair tips may include checking the battery connections, inspecting the high voltage wiring for damage, and consulting with a qualified technician for proper diagnosis and repair.

7. Can a DIY enthusiast repair OBDII code P1E03 (Hybrid/Electric Vehicle Battery 95 Circuit High Voltage)?

Due to the complexities of hybrid/electric vehicle systems and high voltage components, it is recommended to seek professional help for repairing this code.

8. How much does it typically cost to repair OBDII code P1E03 (Hybrid/Electric Vehicle Battery 95 Circuit High Voltage)?

The cost of repairing this code can vary depending on the exact cause of the issue, but it may involve expenses for parts replacement and labor.

9. Are there any preventative measures to avoid OBDII code P1E03 (Hybrid/Electric Vehicle Battery 95 Circuit High Voltage)?

Regular maintenance of the hybrid/electric vehicle system, including battery checks and system inspections, can help prevent issues that may trigger this code.

10. Can OBDII code P1E03 (Hybrid/Electric Vehicle Battery 95 Circuit High Voltage) be cleared/reset without repairs?

While the code can be cleared/reset, it is important to address the underlying issue causing the code to prevent further problems with the hybrid/electric vehicle system.