AutoCodes – GMC – P1E71 GMC

P1E71 GMC Code - Hybrid/Electric Vehicle Battery 70 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: P1E71 GMC indicates Hybrid/Electric Vehicle Battery 70 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 911

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 P1E71 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 P1E71 GMC - Hybrid/Electric Vehicle Battery 70 Circuit - AutoCodes.com — P1E71 GMC Code - Hybrid/Electric Vehicle Battery 70 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E71 GMC?

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

How to Fix the DTC P1E71 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 P1E71 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 P1E71 GMC Code

1. What are the common symptoms of OBDII code P1E71 in a GMC Hybrid/Electric Vehicle?

The common symptoms include reduced electric vehicle range, loss of power, and illumination of the hybrid system warning light.

2. What typically causes the OBDII code P1E71 in a GMC Hybrid/Electric Vehicle?

This code is often caused by issues with the hybrid/electric vehicle battery 70 circuit, such as a faulty battery pack, damaged wiring, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P1E71 in my GMC Hybrid/Electric Vehicle?

Diagnosing this code usually requires specialized diagnostic equipment to test the battery pack, check the wiring for damage, and evaluate the battery management system for faults.

4. Can I continue driving my GMC Hybrid/Electric Vehicle with the OBDII code P1E71 present?

It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage to the battery system and potentially unsafe driving conditions.

5. What are some repair tips for resolving the OBDII code P1E71 in a GMC Hybrid/Electric Vehicle?

Repairing this code may involve replacing the faulty battery pack, repairing damaged wiring, or recalibrating the battery management system. It is recommended to consult a qualified technician for proper diagnosis and repair.

6. Is the repair for OBDII code P1E71 in a GMC Hybrid/Electric Vehicle covered under warranty?

Depending on the vehicle's warranty coverage, repairs for this code may be covered if the vehicle is still under warranty. Check with your dealership or manufacturer for more information.

7. How urgent is it to address the OBDII code P1E71 in a GMC Hybrid/Electric Vehicle?

It is important to address this code promptly to prevent further damage to the hybrid/electric vehicle battery system and ensure the vehicle operates safely and efficiently.

8. Can I reset the OBDII code P1E71 in my GMC Hybrid/Electric Vehicle using an OBDII scanner?

While you can clear the code with an OBDII scanner, it is crucial to diagnose and address the underlying issue causing the code to prevent it from reoccurring.

9. Are there any preventive maintenance steps I can take to avoid the OBDII code P1E71 in my GMC Hybrid/Electric Vehicle?

Regularly maintaining the hybrid/electric vehicle battery system, such as checking for leaks, monitoring battery health, and following the manufacturer's recommended maintenance schedule, can help prevent this code from appearing.

10. How long does it typically take to repair the OBDII code P1E71 in a GMC Hybrid/Electric Vehicle?

The repair time can vary depending on the specific issue causing the code and the availability of parts. It is best to consult with a professional technician for an accurate estimate of the repair timeline.