AutoCodes – Generic – P1E74

P1E74 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 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 952

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

What does this mean?

What are the Possible Causes of the DTC P1E74?

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

How to Fix the DTC P1E74?

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 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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Need Help with the Code?

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Information for Specific Makes

P1E74 Buick — Hybrid/Electric Vehicle Battery 73 Circuit
P1E74 Cadillac — Hybrid/Electric Vehicle Battery 73 Circuit
P1E74 Chevrolet — Hybrid/Electric Vehicle Battery 73 Circuit
P1E74 GMC — Hybrid/Electric Vehicle Battery 73 Circuit
P1E74 Saturn — Hybrid/Electric Vehicle Battery 73 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 P1E74 Code

1. What are the common symptoms of OBDII code P1E74 (Hybrid/Electric Vehicle Battery 73 Circuit)?

- Common symptoms include poor hybrid battery performance, reduced fuel efficiency, and potential drivability issues.

2. What are the possible causes of OBDII code P1E74?

- The code P1E74 can be triggered by issues such as a faulty battery cell, damaged wiring, or problems with the battery management system.

3. How can I diagnose the Hybrid/Electric Vehicle Battery 73 Circuit issue associated with code P1E74?

- Diagnosis typically involves using a professional scan tool to read the code, conducting a visual inspection of the battery components, and performing voltage tests.

4. Can I drive my vehicle with OBDII code P1E74 present?

- It is not recommended to drive the vehicle with code P1E74 active, as it can lead to further damage to the hybrid/electric system.

5. What are some repair tips for fixing OBDII code P1E74?

- Repair tips may include checking and repairing wiring connections, replacing damaged battery cells, or recalibrating the battery management system.

6. How much does it cost to repair OBDII code P1E74?

- Repair costs for OBDII code P1E74 can vary depending on the extent of the issue, the parts needed, and labor rates. It is advisable to consult with a professional technician for an accurate estimate.

7. Can I reset OBDII code P1E74 without fixing the underlying issue?

- While you can clear the code temporarily, it will likely reappear if the root cause is not addressed. It is essential to diagnose and repair the problem to prevent further issues.

8. Are there any safety precautions to consider when dealing with the Hybrid/Electric Vehicle Battery 73 Circuit issue?

- Safety precautions may include disconnecting the hybrid/electric system, wearing appropriate protective gear, and following manufacturer guidelines to avoid accidents or injuries.

9. How long does it take to repair OBDII code P1E74?

- The repair time for OBDII code P1E74 can vary depending on the complexity of the issue, parts availability, and the technician's experience. Some repairs may take a few hours to complete.

10. Can a DIY enthusiast fix OBDII code P1E74, or should I seek professional help?

- Repairing OBDII code P1E74 related to the Hybrid/Electric Vehicle Battery 73 Circuit may require specialized knowledge and tools. It is recommended to consult with a qualified technician for proper diagnosis and repair.