AutoCodes – Saturn – P1E02 Saturn

P1E02 Saturn 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 Saturn 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 775

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

What does this mean?

What are the Possible Causes of the DTC P1E02 Saturn?

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

How to Fix the DTC P1E02 Saturn?

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 Saturn 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 P1E02 Saturn Code

What does OBDII code P1E02 mean on a Saturn?

Code P1E02 indicates a "Hybrid/Electric Vehicle Battery 95 Circuit Low Voltage," meaning the vehicleâ€™s battery control system has detected an issue with the voltage in a specific circuit related to the hybrid or electric battery.

What are the common symptoms of code P1E02 in a Saturn?

Common symptoms include a check engine light, reduced fuel efficiency, limited performance in hybrid or electric modes, and possible warning messages about battery or charging system issues.

What causes the P1E02 code to appear?

Possible causes include a damaged or low-voltage hybrid battery cell, faulty wiring or connectors in the battery circuit, a malfunctioning battery control module, or corrosion affecting electrical connections.

Can you drive with the P1E02 code on a Saturn?

Driving with the P1E02 code is not recommended as it can lead to reduced performance, further damage to the electrical system, or complete loss of hybrid or electric functionality.

How do you diagnose the P1E02 code on a Saturn?

A technician will use an advanced scan tool to analyze the battery control module data, inspect the battery pack and related wiring for damage or corrosion, and test the voltage levels in the affected circuit.

What repairs can fix the P1E02 code on a Saturn?

Repairs may include replacing damaged wiring or connectors, cleaning corroded connections, reprogramming or replacing the battery control module, or replacing faulty battery cells in the hybrid/electric battery pack.

Does the P1E02 code mean the entire battery pack needs to be replaced?

Not necessarily. The issue may be isolated to specific cells or circuits, and repairing or replacing those components may resolve the problem without requiring a full battery replacement.

What tools are needed to fix the P1E02 code?

Specialized diagnostic tools, such as an OBDII scanner with hybrid system capabilities, a multimeter for testing voltage, and appropriate tools for accessing and servicing the battery pack, are typically required.

How much does it cost to fix a P1E02 code on a Saturn?

The cost can vary widely depending on the issue, ranging from $100-$300 for minor wiring repairs to over $1,000 if battery module replacement or extensive repairs are needed.

Can code P1E02 clear itself after repairs?

If the underlying issue is resolved, the code may clear itself after several drive cycles. However, itâ€™s recommended to use a scan tool to manually clear the code and confirm the repair.