AutoCodes – Generic – P1E01

P1E01 Code - Hybrid/Electric Vehicle Battery 95 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: P1E01 indicates Hybrid/Electric Vehicle Battery 95 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 3,821

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 P1E01 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 P1E01 - Hybrid/Electric Vehicle Battery 95 Circuit Performance - AutoCodes.com — P1E01 Code - Hybrid/Electric Vehicle Battery 95 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1E01?

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

How to Fix the DTC P1E01?

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 P1E01 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?

Get the P1E01 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1E01 Buick — Hybrid/Electric Vehicle Battery 95 Circuit Performance
P1E01 Cadillac — Hybrid/Electric Vehicle Battery 95 Circuit Performance
P1E01 Chevrolet — Hybrid/Electric Vehicle Battery 95 Circuit Performance
P1E01 GMC — Hybrid/Electric Vehicle Battery 95 Circuit Performance
P1E01 Saturn — Hybrid/Electric Vehicle Battery 95 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 P1E01 Code

1. What are common symptoms of OBDII code P1E01 (Hybrid/Electric Vehicle Battery 95 Circuit Performance)?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential issues with the vehicle's battery charging.

2. What are the possible causes of OBDII code P1E01?

- Possible causes of this code include a faulty battery pack, issues with battery temperature sensors, wiring problems, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P1E01?

- Diagnosing this code typically involves using a scan tool to retrieve the code, inspecting the battery pack and related components, and performing electrical tests to identify the root cause.

4. Can I continue driving my vehicle with the P1E01 code present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid system and potentially affect the vehicle's overall performance.

5. What are some repair tips for addressing OBDII code P1E01?

- Repair tips may include checking and repairing any damaged wiring, replacing faulty battery components, ensuring proper battery cooling, and resetting the system after repairs are made.

6. Is it possible to reset the OBDII code P1E01 without fixing the underlying issue?

- While clearing the code may temporarily turn off the warning light, the underlying issue causing the code will persist and may lead to further problems down the road. It is recommended to address the root cause of the code.

7. How much does it typically cost to repair OBDII code P1E01?

- The cost of repairing this code can vary depending on the specific cause of the issue, the extent of the damage, and labor costs. It is advisable to consult with a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast fix OBDII code P1E01 at home?

- Some aspects of diagnosing and repairing this code may be within reach of experienced DIY enthusiasts, but due to the complexity of hybrid/electric vehicle systems, it is recommended to seek professional help to ensure proper diagnosis and repair.

9. Are there any preventive measures to avoid OBDII code P1E01 in hybrid/electric vehicles?

- Regular maintenance of the hybrid system, including checking the battery pack, monitoring battery temperatures, and addressing any warning signs promptly, can help prevent issues that may trigger this code.

10. How long does it take to repair OBDII code P1E01?

- The repair time for this code can vary depending on the specific cause of the issue, availability of parts, and the mechanic's expertise. It is advisable to consult with a professional for a more accurate estimate of the repair duration.