AutoCodes – Generic – P1E7B

P1E7B Code - Hybrid/Electric Vehicle Battery 80 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: P1E7B indicates Hybrid/Electric Vehicle Battery 80 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 886

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 P1E7B 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 P1E7B - Hybrid/Electric Vehicle Battery 80 Circuit - AutoCodes.com — P1E7B Code - Hybrid/Electric Vehicle Battery 80 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E7B?

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

How to Fix the DTC P1E7B?

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 P1E7B 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

P1E7B Buick — Hybrid/Electric Vehicle Battery 80 Circuit
P1E7B Cadillac — Hybrid/Electric Vehicle Battery 80 Circuit
P1E7B Chevrolet — Hybrid/Electric Vehicle Battery 80 Circuit
P1E7B GMC — Hybrid/Electric Vehicle Battery 80 Circuit
P1E7B Saturn — Hybrid/Electric Vehicle Battery 80 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 P1E7B Code

1. What does the OBDII code P1E7B mean?

P1E7B indicates an issue with the Hybrid/Electric Vehicle Battery 80 Circuit, typically related to a fault in the communication or functionality of the battery monitoring system.

2. What are the common symptoms of code P1E7B?

Symptoms may include an illuminated check engine light, reduced hybrid or electric vehicle performance, limited driving range, or issues with battery charging.

3. What causes the P1E7B code to appear?

Common causes include faulty battery sensors, damaged wiring or connectors in the battery circuit, a malfunctioning battery management module, or a failing hybrid battery.

4. Can I drive my car with a P1E7B code?

While the vehicle may still operate, driving with this code is not recommended as it could lead to further damage or reduced performance, especially in hybrid or electric functionality.

5. How can I diagnose the P1E7B code?

Diagnosis involves scanning for additional codes, inspecting battery sensor connections and wiring, and testing the battery management module for faults.

6. What repairs can fix the P1E7B code?

Repairs may include replacing the battery sensor, repairing or replacing damaged wiring or connectors, or replacing the hybrid battery or battery management module if necessary.

7. Is the P1E7B code specific to a certain vehicle?

This code is most commonly found in hybrid and electric vehicles from manufacturers like GM, but its specific application and meaning can vary by make and model.

8. How much does it cost to repair the P1E7B code?

Repair costs can vary widely depending on the issue, ranging from $100 for wiring repairs to several thousand dollars if the hybrid battery or control module needs replacement.

9. Can a software update fix the P1E7B code?

In some cases, a software update for the battery management system may resolve the issue, especially if the fault is related to outdated programming.

10. What preventive maintenance can help avoid the P1E7B code?

Regularly inspecting the battery system, keeping connections clean and secure, and ensuring the vehicleâ€™s software is up to date can help prevent this code.