AutoCodes – GMC – P1E7F GMC

P1E7F GMC Code - Hybrid/Electric Vehicle Battery 84 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: P1E7F GMC indicates Hybrid/Electric Vehicle Battery 84 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 802

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 P1E7F GMC 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 P1E7F GMC - Hybrid/Electric Vehicle Battery 84 Circuit - AutoCodes.com — P1E7F GMC Code - Hybrid/Electric Vehicle Battery 84 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E7F GMC?

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

How to Fix the DTC P1E7F GMC?

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 P1E7F GMC 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 P1E7F GMC Code

What does the OBDII code P1E7F mean for my GMC vehicle?

The code P1E7F indicates a problem with the Hybrid/Electric Vehicle Battery 84 Circuit, which may affect the performance of the vehicle's hybrid or electric powertrain.

What are common symptoms of the P1E7F code?

Common symptoms include reduced engine power, warning lights on the dashboard, and poor fuel efficiency, as well as potential issues with the electric drive system.

What could cause the P1E7F code to trigger?

Possible causes include a faulty battery pack, issues with the battery management system, damaged wiring or connectors in the battery circuit, or a malfunctioning power inverter module.

How can I diagnose the P1E7F code?

To diagnose the P1E7F code, use an OBDII scanner to read the code and any related codes, inspect the battery and wiring for damage, and check the battery management system for proper operation.

What repairs are typically needed for the P1E7F code?

Repairs may include replacing the battery pack, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the battery management system.

Is it safe to drive my GMC with the P1E7F code?

It is not recommended to drive the vehicle with the P1E7F code active, as it may lead to reduced performance and could potentially leave you stranded if the hybrid system fails.

Can I clear the P1E7F code myself?

Yes, you can clear the code using an OBDII scanner, but it's important to address the underlying issue to prevent the code from reappearing.

How can I prevent the P1E7F code from occurring in the future?

Regular maintenance of the hybrid battery system, ensuring proper connections, and monitoring the vehicle's performance can help prevent the P1E7F code from recurring.

When should I seek professional help for the P1E7F code?

If you are unable to diagnose or repair the issue yourself, or if the warning lights persist after attempting repairs, it's best to seek help from a qualified mechanic or dealership specializing in hybrid vehicles.