AutoCodes – Buick – P1E73 Buick

P1E73 Buick Code - Hybrid/Electric Vehicle Battery 72 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: P1E73 Buick indicates Hybrid/Electric Vehicle Battery 72 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 775

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 P1E73 Buick 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 P1E73 Buick - Hybrid/Electric Vehicle Battery 72 Circuit - AutoCodes.com — P1E73 Buick Code - Hybrid/Electric Vehicle Battery 72 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E73 Buick?

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

How to Fix the DTC P1E73 Buick?

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 P1E73 Buick 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 P1E73 Buick Code

1. What are common symptoms of OBDII code P1E73 Buick related to the Hybrid/Electric Vehicle Battery 72 Circuit?

- Common symptoms include a decrease in vehicle performance, reduced fuel efficiency, and potential issues with the hybrid/electric system.

2. What are some possible causes of OBDII code P1E73 Buick indicating an issue with the Hybrid/Electric Vehicle Battery 72 Circuit?

- Possible causes may include a faulty battery, damaged wiring or connectors, a malfunctioning battery management system, or software issues.

3. How can I diagnose the Hybrid/Electric Vehicle Battery 72 Circuit issue causing OBDII code P1E73 in my Buick?

- Diagnosis typically involves using a diagnostic scanner to read the code, inspecting the battery and related components for physical damage, and testing the electrical connections.

4. Can I continue driving my Buick with OBDII code P1E73 related to the Hybrid/Electric Vehicle Battery 72 Circuit?

- It is not recommended to continue driving the vehicle with this code, as it may lead to further damage to the hybrid/electric system and potentially unsafe driving conditions.

5. What are some repair tips for fixing the Hybrid/Electric Vehicle Battery 72 Circuit issue triggering OBDII code P1E73 in my Buick?

- Repair tips may include checking and repairing any damaged wiring, replacing the battery if necessary, resetting the battery management system, and ensuring all connections are secure.

6. How much does it typically cost to repair OBDII code P1E73 associated with the Hybrid/Electric Vehicle Battery 72 Circuit in a Buick?

- Repair costs can vary depending on the extent of the issue and the specific repairs needed, but it is advisable to consult with a professional mechanic or dealership for an accurate estimate.

7. Is it possible to reset the OBDII code P1E73 related to the Hybrid/Electric Vehicle Battery 72 Circuit in my Buick without making any repairs?

- While clearing the code temporarily may be possible, it is important to address the underlying issue causing the code to prevent further problems with the hybrid/electric system.

8. Are there any preventative maintenance measures I can take to avoid encountering OBDII code P1E73 in my Buick's Hybrid/Electric Vehicle Battery 72 Circuit?

- Regularly inspecting the battery and electrical components, following recommended maintenance schedules, and avoiding overloading the hybrid/electric system can help prevent this issue.

9. Can a DIY enthusiast with basic automotive knowledge fix the Hybrid/Electric Vehicle Battery 72 Circuit problem triggering OBDII code P1E73 in a Buick?

- Depending on the specific issue, some repairs related to the hybrid/electric system may require specialized knowledge and tools, so it is recommended to consult with a professional technician.

10. How long does it typically take to repair the Hybrid/Electric Vehicle Battery 72 Circuit issue causing OBDII code P1E73 in a Buick?

- The repair duration can vary based on the complexity of the problem, availability of parts, and the technician's expertise, so it is best to consult with a professional for an estimated timeline.