AutoCodes – Cadillac – P1E7A Cadillac

P1E7A Cadillac Code - Hybrid/Electric Vehicle Battery 79 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: P1E7A Cadillac indicates Hybrid/Electric Vehicle Battery 79 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 724

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 P1E7A Cadillac 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 P1E7A Cadillac - Hybrid/Electric Vehicle Battery 79 Circuit - AutoCodes.com — P1E7A Cadillac Code - Hybrid/Electric Vehicle Battery 79 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E7A Cadillac?

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

How to Fix the DTC P1E7A Cadillac?

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 P1E7A Cadillac 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 P1E7A Cadillac Code

1. What are common symptoms of OBDII code P1E7A in a Cadillac hybrid/electric vehicle?

The common symptoms include the vehicle not starting or running on electric power, reduced fuel efficiency, and dashboard warning lights related to the hybrid/electric system.

2. What does the OBDII code P1E7A Cadillac Hybrid/Electric Vehicle Battery 79 Circuit indicate?

This code points to a malfunction or issue with the hybrid/electric vehicle battery 79 circuit in a Cadillac.

3. What are possible causes of OBDII code P1E7A in a Cadillac hybrid/electric vehicle?

Potential causes of this code include a faulty battery pack, damaged wiring or connectors in the battery circuit, software issues, or problems with the battery management system.

4. How can I diagnose the OBDII code P1E7A in my Cadillac hybrid/electric vehicle?

Diagnosing this code typically involves using a diagnostic scanner to read the code and check for any additional codes or system data related to the hybrid/electric battery. It may also involve a visual inspection of the battery and its connections.

5. Can I continue to drive my Cadillac with the P1E7A code present?

It is not recommended to drive the vehicle with this code present, as it could lead to further damage to the hybrid/electric system. It's best to have the issue diagnosed and repaired as soon as possible.

6. What are some repair tips for fixing OBDII code P1E7A in a Cadillac hybrid/electric vehicle?

Repair tips may include checking and repairing any damaged wiring or connectors, testing the battery pack for faults, updating software if needed, and ensuring proper functioning of the battery management system.

7. Is it safe to attempt repairs on the hybrid/electric battery circuit myself?

Due to the complex and potentially dangerous nature of high-voltage systems in hybrid/electric vehicles, it is recommended to have repairs related to the battery circuit performed by a qualified technician or at a specialized repair facility.

8. How much does it typically cost to repair OBDII code P1E7A in a Cadillac hybrid/electric vehicle?

The cost of repairing this code can vary depending on the specific issue causing it, the extent of the repairs needed, and labor rates in your area. It's advisable to get a diagnosis and repair estimate from a trusted mechanic or dealership.

9. Can a local auto parts store clear the OBDII code P1E7A for me?

While some auto parts stores offer free OBDII code scanning services, clearing the code may not address the underlying issue causing it. It's best to diagnose and repair the problem to prevent the code from reoccurring.

10. How can I prevent OBDII code P1E7A from appearing in my Cadillac hybrid/electric vehicle?

Regular maintenance of the hybrid/electric system, including checking the battery connections, monitoring system warnings, and addressing any issues promptly, can help prevent the recurrence of this code.