AutoCodes – Generic – P1E04

P1E04 Code - Hybrid/Electric Vehicle Battery 96 Circuit Performance

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: P1E04 indicates Hybrid/Electric Vehicle Battery 96 Circuit Performance.
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 1,457

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 P1E04 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 P1E04 - Hybrid/Electric Vehicle Battery 96 Circuit Performance - AutoCodes.com — P1E04 Code - Hybrid/Electric Vehicle Battery 96 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1E04?

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

How to Fix the DTC P1E04?

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 P1E04 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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Need Help with the Code?

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Information for Specific Makes

P1E04 Buick — Hybrid/Electric Vehicle Battery 96 Circuit Performance
P1E04 Cadillac — Hybrid/Electric Vehicle Battery 96 Circuit Performance
P1E04 Chevrolet — Hybrid/Electric Vehicle Battery 96 Circuit Performance
P1E04 GMC — Hybrid/Electric Vehicle Battery 96 Circuit Performance
P1E04 Saturn — Hybrid/Electric Vehicle Battery 96 Circuit Performance

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 P1E04 Code

1. What are common symptoms of OBDII code P1E04 (Hybrid/Electric Vehicle Battery 96 Circuit Performance)?

The common symptoms of code P1E04 may include reduced electric vehicle range, difficulty starting the vehicle, and a noticeable drop in overall performance.

2. What are the possible causes of OBDII code P1E04?

Possible causes of code P1E04 can include issues with the hybrid/electric vehicle battery, a faulty battery management system, poor electrical connections, or a malfunctioning battery temperature sensor.

3. How can I diagnose OBDII code P1E04?

Diagnosing code P1E04 may involve using a diagnostic scanner to retrieve the code, checking the battery connections for any loose or corroded terminals, and inspecting the battery health using specialized equipment.

4. Can I drive my vehicle with OBDII code P1E04 present?

It is not recommended to drive your vehicle with code P1E04 present, as it can lead to further damage to the hybrid/electric vehicle battery system and potentially leave you stranded.

5. How can I repair OBDII code P1E04?

Repairing code P1E04 may involve replacing the hybrid/electric vehicle battery, repairing any damaged wiring or connections, resetting the battery management system, or recalibrating the battery temperature sensor.

6. Are there any DIY tips for addressing OBDII code P1E04?

While some basic troubleshooting like checking for loose connections can be done DIY, it is recommended to seek professional help for diagnosing and repairing code P1E04 due to the complexity of hybrid/electric vehicle systems.

7. How much does it cost to fix OBDII code P1E04?

The cost of fixing code P1E04 can vary depending on the root cause of the issue, the extent of the damage, and the labor rates of the repair shop. It is advisable to get multiple quotes from reputable mechanics.

8. Can a weak hybrid/electric vehicle battery cause OBDII code P1E04?

Yes, a weak or failing hybrid/electric vehicle battery can trigger code P1E04 due to its impact on the overall performance and efficiency of the battery system.

9. Is OBDII code P1E04 specific to certain hybrid or electric vehicle models?

Code P1E04 related to Hybrid/Electric Vehicle Battery 96 Circuit Performance can be specific to certain hybrid or electric vehicle models, as each manufacturer may have variations in their battery systems and diagnostics.

10. How often should I have the hybrid/electric vehicle battery system checked to prevent OBDII code P1E04?

It is recommended to have the hybrid/electric vehicle battery system checked regularly as part of routine maintenance, especially if you notice any symptoms related to reduced performance or efficiency.