AutoCodes – Buick – P1E7F Buick

P1E7F Buick 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 Buick 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 694

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

What does this mean?

What are the Possible Causes of the DTC P1E7F Buick?

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

How to Fix the DTC P1E7F 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 P1E7F 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 P1E7F Buick Code

1. What are the common symptoms of OBDII code P1E7F Buick related to the Hybrid/Electric Vehicle Battery 84 Circuit?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potential issues with regenerative braking.

2. What are the possible causes of OBDII code P1E7F Buick indicating a problem with the Hybrid/Electric Vehicle Battery 84 Circuit?

- The code can be triggered by issues such as a faulty battery pack, damaged wiring, poor connections, or problems with the battery management system.

3. How can I diagnose the Hybrid/Electric Vehicle Battery 84 Circuit issue related to OBDII code P1E7F Buick?

- A thorough diagnostic scan using an OBDII scanner capable of reading hybrid/electric vehicle codes can help pinpoint the exact cause of the problem.

4. Is it safe to continue driving my Buick with OBDII code P1E7F related to the Hybrid/Electric Vehicle Battery 84 Circuit?

- It is not recommended to drive the vehicle with this code present, as it can lead to more severe issues and potentially cause damage to the hybrid system components.

5. Can I repair OBDII code P1E7F Buick myself, or should I seek professional help for the Hybrid/Electric Vehicle Battery 84 Circuit problem?

- Due to the complexity of hybrid/electric systems, it's advisable to seek professional help from a certified technician who has experience working on hybrid vehicles.

6. Are there any temporary fixes or resets I can try for OBDII code P1E7F related to the Hybrid/Electric Vehicle Battery 84 Circuit?

- Attempting a simple battery reset or disconnecting and reconnecting the hybrid battery may temporarily clear the code, but it's crucial to address the root cause of the issue.

7. How much does it typically cost to repair OBDII code P1E7F Buick concerning the Hybrid/Electric Vehicle Battery 84 Circuit?

- Repair costs can vary depending on the specific problem, but expect expenses related to parts replacement, labor, and potential diagnostic fees.

8. Will clearing the OBDII code P1E7F related to the Hybrid/Electric Vehicle Battery 84 Circuit make the problem disappear permanently?

- Clearing the code without addressing the underlying issue will likely result in the code reappearing once the problem persists, so it's important to fix the root cause.

9. Can extreme weather conditions or driving habits contribute to triggering OBDII code P1E7F Buick regarding the Hybrid/Electric Vehicle Battery 84 Circuit?

- Yes, harsh weather conditions, frequent short trips, and aggressive driving can impact the hybrid system and potentially trigger the code.

10. Are there any preventive maintenance tips to avoid encountering OBDII code P1E7F related to the Hybrid/Electric Vehicle Battery 84 Circuit in the future?

- Regularly scheduled maintenance, monitoring hybrid system performance, and following manufacturer recommendations for battery care can help prevent issues leading to this code.