AutoCodes – Chevrolet – P1E7C Chevrolet

P1E7C Chevrolet Code - Hybrid/Electric Vehicle Battery 81 Circuit

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: P1E7C Chevrolet indicates Hybrid/Electric Vehicle Battery 81 Circuit.
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 846

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 P1E7C Chevrolet 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 P1E7C Chevrolet - Hybrid/Electric Vehicle Battery 81 Circuit - AutoCodes.com — P1E7C Chevrolet Code - Hybrid/Electric Vehicle Battery 81 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E7C Chevrolet?

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

How to Fix the DTC P1E7C Chevrolet?

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 P1E7C Chevrolet 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 P1E7C Chevrolet Code

What does the OBDII code P1E7C mean for my Chevrolet vehicle?

The OBDII code P1E7C indicates an issue with the Hybrid/Electric Vehicle Battery 81 circuit, which can affect the performance of the hybrid or electric vehicle system.

What are the common symptoms associated with the P1E7C code?

Common symptoms include reduced engine power, warning lights on the dashboard (such as the check engine light), and potential issues with the vehicle's hybrid operation.

What could cause the P1E7C code to trigger?

Causes may include a faulty hybrid battery, damaged wiring or connectors in the battery circuit, or issues with the battery management system.

How can I diagnose the P1E7C code in my Chevrolet?

To diagnose the P1E7C code, use an OBDII scanner to retrieve the code, inspect the hybrid battery and related circuits for physical damage, and check for any other codes that may provide additional context.

Can I drive my Chevrolet with the P1E7C code active?

It's not recommended to drive the vehicle with this code active, as it may lead to reduced performance or further damage to the hybrid system.

What are potential repair options for the P1E7C code?

Repair options may include replacing the hybrid battery, repairing or replacing damaged wiring or connectors, or updating the vehicle's software if applicable.

Is it safe to reset the P1E7C code without making repairs?

Resetting the P1E7C code without addressing the underlying issue is not safe, as the problem may reoccur and could lead to more serious damage.

How much might it cost to repair the issue associated with the P1E7C code?

Repair costs can vary widely depending on the specific issue but may range from a few hundred to several thousand dollars, especially if a hybrid battery replacement is necessary.

Should I take my Chevrolet to a dealer or an independent shop for P1E7C code repairs?

While both options can be effective, taking your vehicle to a dealer may provide access to specialized knowledge and tools for hybrid systems, especially if your vehicle is still under warranty.