AutoCodes – Generic – P1E4C

P1E4C Code - Hybrid/Electric Vehicle Battery 33 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: P1E4C indicates Hybrid/Electric Vehicle Battery 33 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 1,079

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 P1E4C 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 P1E4C - Hybrid/Electric Vehicle Battery 33 Circuit - AutoCodes.com — P1E4C Code - Hybrid/Electric Vehicle Battery 33 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E4C?

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

How to Fix the DTC P1E4C?

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 P1E4C 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

P1E4C Acura — Slave Cylinder Drive Motor Power Source Circuit High Voltage
P1E4C Buick — Hybrid/Electric Vehicle Battery 33 Circuit
P1E4C Cadillac — Hybrid/Electric Vehicle Battery 33 Circuit
P1E4C Chevrolet — Hybrid/Electric Vehicle Battery 33 Circuit
P1E4C GMC — Hybrid/Electric Vehicle Battery 33 Circuit
P1E4C Honda — Slave Cylinder Drive Motor Power Source Circuit High Voltage
P1E4C Saturn — Hybrid/Electric Vehicle Battery 33 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 P1E4C Code

1. What does the OBDII code P1E4C mean?

Code P1E4C indicates an issue in the Hybrid/Electric Vehicle Battery 33 Circuit, often related to a malfunction in the battery management system or wiring.

2. What are the symptoms of code P1E4C?

Common symptoms include the hybrid/electric vehicle system warning light, reduced vehicle performance, and possible issues with battery charging or discharging.

3. What causes the P1E4C code to appear?

The code is typically triggered by faulty wiring, a malfunctioning battery sensor, a damaged hybrid battery cell, or a failure in the battery control module.

4. Can code P1E4C cause drivability issues?

Yes, it can lead to reduced power output, limited electric-only operation, or even disable the hybrid system in severe cases.

5. How is the P1E4C code diagnosed?

A technician will use a scan tool to retrieve the code, inspect the battery circuit wiring and connections, and test the battery control module and sensors for proper function.

6. Is it safe to drive with the P1E4C code active?

Driving may still be possible, but itâ€™s not recommended as it could lead to further damage to the hybrid system or leave you stranded.

7. What repairs are needed to fix the P1E4C code?

Repairs may include replacing damaged wiring, repairing or replacing the battery control module, or addressing issues with the hybrid battery pack.

8. How much does it cost to fix the P1E4C code?

The cost varies depending on the specific issue but could range from $200 for minor wiring repairs to several thousand dollars if the hybrid battery needs replacement.

9. Can a weak 12V battery trigger the P1E4C code?

While unlikely, a weak or failing 12V auxiliary battery can sometimes cause hybrid system errors. Itâ€™s worth testing the 12V battery as part of the diagnostic process.

10. How can I prevent the P1E4C code from occurring?

Regular maintenance of the hybrid battery system, ensuring clean and secure connections, and addressing hybrid system warnings promptly can help prevent this code.