AutoCodes – GMC – P1E4C GMC

P1E4C GMC 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 GMC 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 1,019

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

What does this mean?

What are the Possible Causes of the DTC P1E4C GMC?

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

How to Fix the DTC P1E4C GMC?

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 GMC 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 P1E4C GMC Code

1. What does the OBDII code P1E4C mean on a GMC?

The P1E4C code indicates an issue with the Hybrid/Electric Vehicle Battery 33 Circuit, often related to voltage or communication problems in the battery control system.

2. What are common symptoms of the P1E4C code?

Symptoms may include a check engine light, reduced power mode, poor fuel economy, or limited electric vehicle operation.

3. What causes the P1E4C code on GMC vehicles?

Common causes include a faulty hybrid battery, damaged wiring or connectors in the battery circuit, or a malfunctioning battery energy control module.

4. Can I drive with the P1E4C code active?

Driving with the P1E4C code is not recommended, as it may lead to reduced performance or further damage to the hybrid system.

5. How is the P1E4C code diagnosed?

A technician will use a scan tool to read the code, inspect the battery circuit wiring and connections, and test the hybrid battery and control module for proper operation.

6. What repairs can fix the P1E4C code?

Repairs may include replacing damaged wiring, repairing or replacing the hybrid battery, or reprogramming or replacing the battery energy control module.

7. How much does it cost to fix the P1E4C code on a GMC vehicle?

Repair costs vary widely depending on the issue, ranging from $100 for minor wiring repairs to over $1,000 for hybrid battery replacement.

8. Can a low or discharged hybrid battery trigger the P1E4C code?

Yes, a low or failing hybrid battery can cause voltage irregularities that trigger this code.

9. Is the P1E4C code covered under warranty for GMC vehicles?

In many cases, hybrid system components may be covered under a longer warranty period, so check your vehicleâ€™s warranty coverage with your dealership.

10. Can I clear the P1E4C code without repairs?

Clearing the code without addressing the underlying issue will likely result in the code returning and may worsen the problem over time.