AutoCodes – Buick – P1E5F Buick

P1E5F Buick Code - Hybrid/Electric Vehicle Battery 52 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: P1E5F Buick indicates Hybrid/Electric Vehicle Battery 52 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 740

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 P1E5F 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 P1E5F Buick - Hybrid/Electric Vehicle Battery 52 Circuit - AutoCodes.com — P1E5F Buick Code - Hybrid/Electric Vehicle Battery 52 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E5F Buick?

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

How to Fix the DTC P1E5F 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 P1E5F 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 P1E5F Buick Code

1. What does the OBDII code P1E5F mean for a Buick?

The P1E5F code indicates a problem with the Hybrid/Electric Vehicle Battery 52 Circuit, typically referring to issues with one or more cells or connections in the high-voltage battery system.

2. What are the common symptoms of the P1E5F code in a Buick?

Symptoms may include an illuminated check engine light, reduced power or performance, the vehicle entering "limp mode," or failure to start.

3. What causes the P1E5F code in a Buick?

Common causes include damaged or faulty battery cells, poor electrical connections, corroded terminals, or issues with the battery control module.

4. Can I drive my Buick with a P1E5F code?

Driving with a P1E5F code is not recommended, as it may lead to further damage or leave you stranded due to potential battery failure.

5. How do I diagnose the P1E5F code in my Buick?

Diagnosis involves using a scan tool to read the code, inspecting the high-voltage battery and wiring, and testing the battery control module for faults.

6. How is the P1E5F code typically repaired?

Repairs may include replacing damaged battery cells, repairing wiring or connections, or reprogramming or replacing the battery control module.

7. How much does it cost to fix a P1E5F code in a Buick?

Costs can vary widely, from a few hundred dollars for minor wiring repairs to several thousand dollars if the high-voltage battery needs replacement.

8. Can a low 12-volt battery cause the P1E5F code?

A low 12-volt battery can sometimes contribute to communication or control issues, but the code typically points to a high-voltage battery issue.

9. Does the P1E5F code require specialized tools to fix?

Yes, diagnosing and repairing the P1E5F code often requires specialized tools and training to safely handle high-voltage systems.

10. Should I take my Buick to a dealer for the P1E5F code?

Itâ€™s recommended to take your vehicle to a dealer or qualified hybrid/electric vehicle technician due to the complexity and safety risks of high-voltage systems.