AutoCodes – Generic – P1E4F

P1E4F Code - Hybrid/Electric Vehicle Battery 36 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: P1E4F indicates Hybrid/Electric Vehicle Battery 36 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 710

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 Apr 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E4F 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 P1E4F - Hybrid/Electric Vehicle Battery 36 Circuit - AutoCodes.com — P1E4F Code - Hybrid/Electric Vehicle Battery 36 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E4F?

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

How to Fix the DTC P1E4F?

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 P1E4F 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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Information for Specific Makes

P1E4F Acura — Motor Angle Signal Malfunction
P1E4F Buick — Hybrid/Electric Vehicle Battery 36 Circuit
P1E4F Cadillac — Hybrid/Electric Vehicle Battery 36 Circuit
P1E4F Chevrolet — Hybrid/Electric Vehicle Battery 36 Circuit
P1E4F GMC — Hybrid/Electric Vehicle Battery 36 Circuit
P1E4F Honda — Motor Angle Signal Malfunction
P1E4F Saturn — Hybrid/Electric Vehicle Battery 36 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 P1E4F Code

1. What does the OBDII code P1E4F mean?

P1E4F indicates an issue with the Hybrid/Electric Vehicle Battery 36 Circuit, typically related to a fault in the monitoring or operation of a specific battery cell or circuit in the hybrid or EV battery system.

2. What are the common symptoms of code P1E4F?

Symptoms may include an illuminated Check Engine Light, reduced fuel efficiency, limited hybrid or EV mode functionality, warning messages on the dashboard, or decreased overall vehicle performance.

3. What causes the P1E4F code to appear?

Causes can include a faulty battery cell, damaged wiring or connectors in the battery circuit, a malfunctioning battery control module, or issues with the hybrid/EV battery cooling system.

4. Can I continue driving with a P1E4F code?

While the vehicle may still operate, it is not recommended to ignore this code as it can lead to reduced performance, potential safety concerns, or further damage to the hybrid/EV battery system.

5. How is the P1E4F code diagnosed?

A technician will use a scan tool to confirm the code, inspect the battery circuit wiring and connectors, check the battery control module, and perform tests on the individual battery cells for faults.

6. How do you fix the P1E4F code?

Repairs may involve replacing a faulty battery cell, repairing damaged wiring or connectors, updating or replacing the battery control module, or addressing cooling system issues.

7. What tools are needed to troubleshoot the P1E4F code?

Diagnostic tools like an OBDII scanner, a multimeter, and specialized equipment for testing hybrid/EV battery cells are typically required.

8. Can a dead 12V battery cause a P1E4F code?

A weak or failing 12V battery can sometimes trigger hybrid/EV-related codes, but P1E4F specifically points to an issue in the high-voltage battery system.

9. How much does it cost to repair a P1E4F code?

Repair costs depend on the root cause. Replacing a single battery cell or fixing wiring might cost a few hundred dollars, whereas a full battery pack replacement could cost several thousand dollars.

10. Can regular maintenance help prevent the P1E4F code?

Yes, ensuring proper battery cooling, inspecting wiring and connectors, and monitoring the health of the hybrid/EV battery can help prevent this code from occurring.