AutoCodes – Saturn – P1E73 Saturn

P1E73 Saturn 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 Saturn 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 845

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P1E73 Saturn?

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

How to Fix the DTC P1E73 Saturn?

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 Saturn 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.

Need more information about the P1E73 Saturn code?

Need more information on how to fix the P1E73 Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1E73 Saturn code diagnosed by a professional: Find a repair shop in your area

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 Saturn Code

1. What does the OBDII code P1E73 mean on a Saturn?

P1E73 indicates an issue with the Hybrid/Electric Vehicle Battery 72 Circuit, often related to the high-voltage battery system or its associated wiring.

2. What are the common symptoms of the P1E73 code in a Saturn?

Symptoms may include the check engine light turning on, reduced fuel efficiency, limited vehicle performance, or the hybrid/electric system going into limp mode.

3. What causes the P1E73 code in a Saturn?

The code can be caused by a faulty high-voltage battery, damaged or corroded wiring, a failed battery management system, or issues with the vehicle's hybrid control module.

4. Can I drive my Saturn with the P1E73 code?

It is not recommended to drive the vehicle for extended periods with this code, as it could lead to further damage to the hybrid system or reduced performance.

5. How is the P1E73 code diagnosed in a Saturn?

A technician will use a diagnostic scanner to read the code, inspect the high-voltage battery and wiring, check for loose connections, and perform voltage and continuity tests.

6. What repairs are needed to fix the P1E73 code?

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

7. How much does it cost to fix the P1E73 code in a Saturn?

The cost varies depending on the root cause, but repairs involving the high-voltage battery or control modules can range from a few hundred to several thousand dollars.

8. Can a low 12V battery cause the P1E73 code in a Saturn?

While unlikely, a weak 12V battery can sometimes cause communication issues that trigger hybrid system codes. Testing the 12V battery is a good first step.

9. How can I prevent the P1E73 code from occurring in a Saturn?

Maintain the hybrid/electric system by following recommended service intervals, inspecting wiring regularly, and addressing electrical issues promptly.

10. Does the P1E73 code require specialized tools to repair?

Yes, diagnosing and repairing this code typically requires specialized diagnostic equipment and training for hybrid/electric vehicle systems.