AutoCodes – Buick – P1E5A Buick

P1E5A Buick Code - Hybrid/Electric Vehicle Battery 47 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: P1E5A Buick indicates Hybrid/Electric Vehicle Battery 47 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 762

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 P1E5A 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 P1E5A Buick - Hybrid/Electric Vehicle Battery 47 Circuit - AutoCodes.com — P1E5A Buick Code - Hybrid/Electric Vehicle Battery 47 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E5A Buick?

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

How to Fix the DTC P1E5A 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 P1E5A 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 P1E5A Buick Code

1. What does the OBDII code P1E5A mean on a Buick?

P1E5A indicates an issue with the Hybrid/Electric Vehicle Battery 47 Circuit, typically related to voltage, communication, or wiring problems in the hybrid battery system.

2. What are the common symptoms of the P1E5A code in a Buick?

Common symptoms include reduced fuel efficiency, warning lights on the dashboard, limited electric vehicle (EV) mode functionality, or the vehicle failing to start.

3. What causes the P1E5A code in a Buick?

This code can be caused by a faulty battery module, damaged wiring or connectors, a malfunctioning battery control module, or an issue with the hybrid battery itself.

4. Can I drive my Buick with the P1E5A code active?

While you may still be able to drive the vehicle, itâ€™s not recommended as it can lead to further damage to the hybrid system or leave you stranded.

5. How is the P1E5A code diagnosed in a Buick?

A technician will use a scan tool to check hybrid system data, inspect the battery and related circuits, and perform voltage and continuity tests on the affected components.

6. What repairs might fix the P1E5A code on a Buick?

Repairs could include replacing the faulty battery module, repairing damaged wiring or connectors, or reprogramming or replacing the battery control module.

7. How much does it cost to fix the P1E5A code in a Buick?

The cost varies depending on the issue, but repairs like replacing a battery module can range from $500 to $2,000 or more, while simpler fixes like wiring repairs may cost less.

8. Can a low-voltage battery cause the P1E5A code in a Buick?

While the low-voltage battery itself isnâ€™t likely the direct cause, issues with the high-voltage hybrid battery or its circuits may trigger this code.

9. Do I need to replace the entire hybrid battery if I get the P1E5A code?

Not necessarily; the issue may be isolated to a specific module or circuit within the battery pack, which can be repaired or replaced individually.

10. How can I prevent the P1E5A code from recurring in my Buick?

Regular maintenance of the hybrid system, ensuring proper connections, and addressing any warning signs early can help prevent this code from recurring.