AutoCodes – GMC – P1E72 GMC

P1E72 GMC Code - Hybrid/Electric Vehicle Battery 71 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: P1E72 GMC indicates Hybrid/Electric Vehicle Battery 71 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 720

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 P1E72 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 P1E72 GMC - Hybrid/Electric Vehicle Battery 71 Circuit - AutoCodes.com — P1E72 GMC Code - Hybrid/Electric Vehicle Battery 71 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E72 GMC?

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

How to Fix the DTC P1E72 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 P1E72 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 P1E72 GMC Code

1. What are the common symptoms of OBDII code P1E72 in a GMC hybrid/electric vehicle?

- Common symptoms include poor battery performance, reduced fuel efficiency, and potential issues with the vehicle's charging system.

2. What are the possible causes of OBDII code P1E72 in a GMC hybrid/electric vehicle?

- The code P1E72 typically indicates a fault in the Hybrid/Electric Vehicle Battery 71 Circuit, which could be caused by wiring issues, a malfunctioning battery cell, or a problem with the battery management system.

3. How can I diagnose the OBDII code P1E72 in my GMC hybrid/electric vehicle?

- Diagnosing code P1E72 usually involves using a professional OBDII scanner to read the specific fault code and then conducting further testing on the battery system components to pinpoint the exact issue.

4. Is it safe to continue driving my GMC hybrid/electric vehicle with OBDII code P1E72 present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the battery system and potentially compromise the vehicle's overall performance and safety.

5. Can I reset the OBDII code P1E72 in my GMC hybrid/electric vehicle myself?

- While you can reset the code using an OBDII scanner, it is important to address the underlying issue causing the code first to prevent it from reoccurring.

6. How much does it typically cost to repair OBDII code P1E72 in a GMC hybrid/electric vehicle?

- The cost of repairing code P1E72 can vary depending on the specific cause of the issue, but it may involve replacing damaged wiring, repairing the battery cell, or recalibrating the battery management system. Costs can range from a few hundred to a few thousand dollars.

7. Are there any DIY repair tips for fixing OBDII code P1E72 in a GMC hybrid/electric vehicle?

- DIY repair for this code is not recommended due to the complex nature of the hybrid/electric vehicle battery system. It is best to consult a professional technician with experience in hybrid vehicle repairs.

8. How often does OBDII code P1E72 occur in GMC hybrid/electric vehicles?

- Code P1E72 is relatively rare but can occur in GMC hybrid/electric vehicles, especially as they age and the battery system components wear out.

9. Can extreme weather conditions contribute to triggering OBDII code P1E72 in a GMC hybrid/electric vehicle?

- Yes, extreme temperatures, both hot and cold, can impact the performance of the hybrid/electric vehicle battery system, potentially leading to issues like code P1E72.

10. Is there a way to prevent OBDII code P1E72 from occurring in my GMC hybrid/electric vehicle?

- Regular maintenance of the hybrid/electric vehicle battery system, including checking for wiring issues and monitoring battery health, can help prevent code P1E72 and other related issues.