AutoCodes – Chevrolet – P1E74 Chevrolet

P1E74 Chevrolet Code - Hybrid/Electric Vehicle Battery 73 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: P1E74 Chevrolet indicates Hybrid/Electric Vehicle Battery 73 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 896

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 P1E74 Chevrolet 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 P1E74 Chevrolet - Hybrid/Electric Vehicle Battery 73 Circuit - AutoCodes.com — P1E74 Chevrolet Code - Hybrid/Electric Vehicle Battery 73 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E74 Chevrolet?

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

How to Fix the DTC P1E74 Chevrolet?

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 P1E74 Chevrolet 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 P1E74 Chevrolet Code

What does the OBDII code P1E74 mean for a Chevrolet vehicle?

The OBDII code P1E74 indicates a problem with the Hybrid/Electric Vehicle Battery 73 circuit, which affects the battery management system's ability to monitor and control the hybrid battery.

What are common symptoms of the P1E74 code?

Common symptoms include a warning light on the dashboard, reduced hybrid system performance, and potential inability to charge the hybrid battery properly.

What could cause the P1E74 code to trigger?

Possible causes include a faulty battery control module, damaged wiring or connectors in the battery circuit, or issues with the hybrid battery itself.

How can I diagnose the P1E74 code?

Start by using an OBDII scanner to confirm the code and check for additional codes. Inspect the wiring and connectors related to the battery circuit for damage, and test the battery control module for faults.

Can the P1E74 code cause performance issues in my vehicle?

Yes, the P1E74 code can lead to reduced efficiency in the hybrid system, decreased power, and possibly a complete shutdown of the hybrid function, affecting overall vehicle performance.

Is it safe to drive a vehicle with the P1E74 code?

While it may be possible to drive the vehicle, it is not recommended as it can lead to further damage to the hybrid system or battery. It's best to address the issue promptly.

What are some repair tips for fixing the P1E74 code?

Inspect and repair any damaged wiring or connectors, replace the battery control module if it's faulty, and check the hybrid battery for any issues. Itâ€™s advisable to consult a professional for complex repairs.

Will clearing the P1E74 code fix the problem?

Clearing the code may temporarily turn off the warning light, but it will not fix the underlying issue. The code is likely to return if the root cause is not addressed.

How much does it typically cost to repair the issue associated with the P1E74 code?

Repair costs can vary widely depending on the specific cause but can range from a few hundred dollars for wiring repairs to over a thousand dollars if a battery control module or battery replacement is needed.