AutoCodes – GMC – P1E04 GMC

P1E04 GMC Code - Hybrid/Electric Vehicle Battery 96 Circuit Performance

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: P1E04 GMC indicates Hybrid/Electric Vehicle Battery 96 Circuit Performance.
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 989

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 P1E04 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 P1E04 GMC - Hybrid/Electric Vehicle Battery 96 Circuit Performance - AutoCodes.com — P1E04 GMC Code - Hybrid/Electric Vehicle Battery 96 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1E04 GMC?

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

How to Fix the DTC P1E04 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 P1E04 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 P1E04 GMC Code

1. What does the OBDII code P1E04 mean for GMC vehicles?

The P1E04 code indicates an issue with the Hybrid/Electric Vehicle Battery 96 Circuit Performance, often related to a fault in the battery monitoring system or a specific sensor.

2. What are the common symptoms of the P1E04 code on a GMC vehicle?

Symptoms may include an illuminated check engine light, reduced hybrid/electric performance, decreased fuel efficiency, and potential warnings for the hybrid system.

3. What causes the P1E04 code to appear in GMC vehicles?

The code can be triggered by a faulty battery sensor, damaged wiring or connectors in the circuit, a malfunctioning battery control module, or degraded battery cells.

4. Can the P1E04 code cause drivability issues?

Yes, depending on the severity, it can lead to reduced power output, limited electric driving range, or the vehicle entering a limp mode to prevent further damage.

5. How is the P1E04 code diagnosed?

A technician will use an advanced scan tool to read the code and check for related codes, inspect the battery management system, and test the wiring, sensors, and control module for faults.

6. Can I drive my GMC vehicle if it has the P1E04 code?

Itâ€™s not recommended to drive the vehicle for extended periods, as the hybrid system may be compromised, potentially leading to further damage or unsafe driving conditions.

7. What repairs are typically needed to fix the P1E04 code?

Repairs may include replacing a faulty battery sensor, repairing or replacing damaged wiring or connectors, reprogramming the battery control module, or addressing internal battery cell issues.

8. How much does it cost to fix the P1E04 code on a GMC vehicle?

The cost varies depending on the root cause, ranging from $100â€“$300 for minor electrical repairs to $1,000 or more if the hybrid battery or control module requires replacement.

9. Can a low 12-volt auxiliary battery cause the P1E04 code?

While unlikely, a weak or failing 12-volt battery could indirectly affect the hybrid systemâ€™s performance and should be checked as part of the diagnosis.

10. Is the P1E04 code covered under warranty for GMC hybrid vehicles?

Depending on the vehicleâ€™s age and mileage, the code may be covered under the hybrid system or battery warranty. Check with your dealership for specific warranty details.