AutoCodes – Generic – P1E02

P1E02 Code - Hybrid/Electric Vehicle Battery 95 Circuit Low 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: P1E02 indicates Hybrid/Electric Vehicle Battery 95 Circuit Low 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 1,098

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 P1E02 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 P1E02 - Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage - AutoCodes.com — P1E02 Code - Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1E02?

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

How to Fix the DTC P1E02?

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 P1E02 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 P1E02 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1E02 Buick — Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage
P1E02 Cadillac — Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage
P1E02 Chevrolet — Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage
P1E02 GMC — Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage
P1E02 Saturn — Hybrid/Electric Vehicle Battery 95 Circuit Low 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 P1E02 Code

1. What are common symptoms of OBDII code P1E02 (Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage)?

The common symptoms of P1E02 include reduced hybrid system performance, decreased fuel efficiency, and potential issues with starting the vehicle.

2. What are the possible causes of OBDII code P1E02?

The potential causes of P1E02 include a faulty hybrid/electric vehicle battery, damaged wiring or connectors in the battery circuit, or issues with the battery management system.

3. How can I diagnose the source of OBDII code P1E02?

Diagnosing P1E02 involves conducting a thorough inspection of the hybrid/electric vehicle battery, checking the wiring and connectors for any damage, and using a diagnostic scanner to retrieve additional fault codes.

4. Is it safe to continue driving with OBDII code P1E02 present?

It is not recommended to continue driving with P1E02 as it can lead to further damage to the hybrid/electric vehicle system. It is best to address the issue promptly to prevent potential safety hazards.

5. Can I reset OBDII code P1E02 and see if it comes back?

While you can reset the code using a diagnostic scanner, it is essential to address the underlying issue causing P1E02 to prevent it from reoccurring. Ignoring the problem may lead to more significant repairs down the line.

6. How can I repair OBDII code P1E02 (Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage)?

Repairing P1E02 typically involves inspecting and repairing any damaged wiring or connectors in the battery circuit, testing the hybrid/electric vehicle battery for faults, and resetting the code after addressing the root cause.

7. Can a DIY enthusiast fix OBDII code P1E02 at home?

While some basic troubleshooting steps can be taken at home, diagnosing and repairing P1E02 may require specialized tools and expertise. It is recommended to consult a professional mechanic or a dealership for thorough diagnosis and repair.

8. How much does it cost to fix OBDII code P1E02?

The cost of fixing P1E02 can vary depending on the specific cause of the issue, the extent of repairs needed, and the labor rates in your area. It is advisable to obtain quotes from different mechanics or dealerships for an accurate estimate.

9. Are there any preventive measures to avoid OBDII code P1E02 in the future?

Regular maintenance of the hybrid/electric vehicle battery, checking for signs of wear on the wiring and connectors, and following the manufacturer's recommended service schedule can help prevent OBDII code P1E02 from occurring.

10. How long can I safely drive with OBDII code P1E02 before getting it repaired?

It is best to address OBDII code P1E02 as soon as possible to prevent potential damage to the hybrid/electric vehicle system. Continuing to drive with the code present can lead to more significant issues and potentially compromise vehicle safety.