AutoCodes – Buick – P1E7D Buick

P1E7D Buick Code - Hybrid/Electric Vehicle Battery 82 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: P1E7D Buick indicates Hybrid/Electric Vehicle Battery 82 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 780

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 P1E7D Buick 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 P1E7D Buick - Hybrid/Electric Vehicle Battery 82 Circuit - AutoCodes.com — P1E7D Buick Code - Hybrid/Electric Vehicle Battery 82 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E7D Buick?

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

How to Fix the DTC P1E7D Buick?

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 P1E7D Buick 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 P1E7D Buick Code

1. What are the common symptoms of OBDII code P1E7D Buick related to the Hybrid/Electric Vehicle Battery 82 Circuit?

- Common symptoms include reduced hybrid system performance, reduced fuel efficiency, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code P1E7D Buick indicating an issue with the Hybrid/Electric Vehicle Battery 82 Circuit?

- Possible causes may include a faulty battery pack, damaged wiring or connectors, software issues, or problems with the battery management system.

3. How can I diagnose the OBDII code P1E7D Buick related to the Hybrid/Electric Vehicle Battery 82 Circuit issue?

- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the battery pack, checking the wiring and connectors for damage, and performing a battery system test.

4. Can I drive my vehicle with the OBDII code P1E7D Buick indicating a problem with the Hybrid/Electric Vehicle Battery 82 Circuit?

- It is not recommended to drive the vehicle with this code as it can lead to further damage to the hybrid system and may result in reduced performance or even complete system failure.

5. How can I repair OBDII code P1E7D Buick associated with the Hybrid/Electric Vehicle Battery 82 Circuit issue?

- Repairs may involve replacing the faulty battery pack, repairing damaged wiring or connectors, updating software, or recalibrating the battery management system.

6. Is it safe to attempt repairing the Hybrid/Electric Vehicle Battery 82 Circuit issue myself?

- Due to the complexity of hybrid/electric vehicle systems, it is recommended to have the issue diagnosed and repaired by a qualified technician familiar with hybrid vehicle technologies.

7. How much does it cost to fix OBDII code P1E7D Buick related to the Hybrid/Electric Vehicle Battery 82 Circuit problem?

- The cost of repairs can vary depending on the extent of the issue, parts needed, and labor costs. It is advisable to obtain estimates from certified repair shops.

8. Can resetting the OBDII code P1E7D Buick related to the Hybrid/Electric Vehicle Battery 82 Circuit temporarily resolve the issue?

- Resetting the code may temporarily turn off the warning light, but it will not fix the underlying problem. It is crucial to address the root cause of the code to prevent further issues.

9. Is there a recall or technical service bulletin related to OBDII code P1E7D Buick affecting the Hybrid/Electric Vehicle Battery 82 Circuit?

- It is recommended to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins related to this specific OBDII code and issue.

10. How often should I have the Hybrid/Electric Vehicle Battery system inspected to prevent OBDII code P1E7D Buick from occurring?

- Regular maintenance and inspections of the hybrid/electric vehicle battery system are crucial to prevent issues like OBDII code P1E7D Buick. It is advisable to follow the manufacturer's recommended maintenance schedule.