AutoCodes – Generic – P1E7F

P1E7F 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 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 846

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

What does this mean?

What are the Possible Causes of the DTC P1E7F?

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

How to Fix the DTC P1E7F?

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 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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Need Help with the Code?

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Information for Specific Makes

P1E7F Buick — Hybrid/Electric Vehicle Battery 84 Circuit
P1E7F Cadillac — Hybrid/Electric Vehicle Battery 84 Circuit
P1E7F Chevrolet — Hybrid/Electric Vehicle Battery 84 Circuit
P1E7F GMC — Hybrid/Electric Vehicle Battery 84 Circuit
P1E7F Saturn — Hybrid/Electric Vehicle Battery 84 Circuit

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 Code

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

- Common symptoms include reduced electric vehicle range, poor battery performance, and potential issues with battery charging.

2. What causes OBDII code P1E7F to be triggered in a hybrid/electric vehicle?

- The code P1E7F is typically triggered by faults in the circuit related to the hybrid/electric vehicle battery 84, often due to wiring issues, faulty battery components, or problems with the battery management system.

3. How can I diagnose the underlying issue causing OBDII code P1E7F in my hybrid/electric vehicle?

- Diagnosis usually involves using a diagnostic scanner to read the code, inspecting the battery connections and wiring, checking the battery voltage, and performing a comprehensive battery system test.

4. Are there any quick repair tips for addressing OBDII code P1E7F related to the Hybrid/Electric Vehicle Battery 84 Circuit?

- Quick repair tips may include checking and tightening battery connections, resetting the battery management system, and ensuring proper charging of the hybrid/electric vehicle battery.

5. Can I continue driving my vehicle with OBDII code P1E7F until I can get it repaired?

- It is not recommended to continue driving your vehicle with OBDII code P1E7F as it can lead to further damage to the hybrid/electric vehicle battery and may result in decreased performance and potential safety hazards.

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

- The cost of repair can vary depending on the root cause of the issue, but it may involve expenses for parts replacement, wiring repairs, and labor costs, ranging from a few hundred to over a thousand dollars.

7. Can I reset OBDII code P1E7F myself, or do I need to take it to a professional mechanic?

- While you can attempt to reset the code yourself using an OBDII scanner, it is advisable to have a professional mechanic diagnose and repair the underlying issue to prevent future occurrences of the code.

8. Are there any preventive measures I can take to avoid OBDII code P1E7F in my hybrid/electric vehicle?

- Regularly inspecting and maintaining the hybrid/electric vehicle battery, keeping the connections clean and secure, and following the manufacturer's recommended maintenance schedule can help prevent issues leading to code P1E7F.

9. How urgent is it to address OBDII code P1E7F related to the Hybrid/Electric Vehicle Battery 84 Circuit?

- It is recommended to address OBDII code P1E7F promptly to prevent further damage to the vehicle's battery system and ensure optimal performance of the hybrid/electric vehicle.

10. Is OBDII code P1E7F a common issue in hybrid/electric vehicles, or is it relatively rare?

- OBDII code P1E7F related to the Hybrid/Electric Vehicle Battery 84 Circuit is a relatively rare issue, but it can occur in hybrid/electric vehicles experiencing problems with the battery system.