AutoCodes – Saturn – P1E81 Saturn

P1E81 Saturn Code - Hybrid/Electric Vehicle Battery 86 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: P1E81 Saturn indicates Hybrid/Electric Vehicle Battery 86 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 961

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 P1E81 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 P1E81 Saturn - Hybrid/Electric Vehicle Battery 86 Circuit - AutoCodes.com — P1E81 Saturn Code - Hybrid/Electric Vehicle Battery 86 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E81 Saturn?

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

How to Fix the DTC P1E81 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 P1E81 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.

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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 P1E81 Saturn Code

1. What are common symptoms associated with OBDII code P1E81 in a Saturn Hybrid/Electric Vehicle?

- Common symptoms include reduced electric vehicle range, warning lights illuminated on the dashboard, and potential difficulty starting the vehicle.

2. What is the main cause of OBDII code P1E81 in a Saturn Hybrid/Electric Vehicle?

- The main cause of code P1E81 is a fault in the 86 circuit of the hybrid/electric vehicle battery, which can lead to issues with battery performance and overall vehicle operation.

3. How can I diagnose the 86 circuit issue triggering OBDII code P1E81 in my Saturn Hybrid/Electric Vehicle?

- Diagnosing the 86 circuit issue typically involves using a multimeter to test the voltage and continuity of the circuit, as well as inspecting the battery connections and components for any visible damage or corrosion.

4. What are some repair tips for addressing OBDII code P1E81 in a Saturn Hybrid/Electric Vehicle?

- Repair tips may include checking and cleaning battery terminals, inspecting wiring harnesses for damage, resetting the fault code after addressing the issue, and seeking professional assistance if necessary.

5. Can driving with OBDII code P1E81 in a Saturn Hybrid/Electric Vehicle cause further damage?

- Continuing to drive with code P1E81 may lead to decreased battery performance, potential risk of complete battery failure, and further damage to other electrical components in the vehicle.

6. How urgent is it to address OBDII code P1E81 in a Saturn Hybrid/Electric Vehicle?

- It is recommended to address code P1E81 promptly to prevent potential safety hazards, further damage to the vehicle's electrical system, and to ensure optimal performance of the hybrid/electric components.

7. Are there any common triggers that can cause OBDII code P1E81 to recur in a Saturn Hybrid/Electric Vehicle?

- Common triggers for code P1E81 recurrence include poor battery maintenance, extreme temperature conditions, frequent rapid charging, and underlying issues with the hybrid/electric system.

8. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P1E81 in a Saturn Hybrid/Electric Vehicle?

- While some basic troubleshooting and repairs can be attempted by a DIY enthusiast, addressing code P1E81 may require specialized tools, expertise, and knowledge of hybrid/electric vehicle systems.

9. How can regular maintenance help prevent OBDII code P1E81 in a Saturn Hybrid/Electric Vehicle?

- Regular maintenance, such as checking and cleaning battery terminals, monitoring battery health, and following manufacturer guidelines for charging, can help prevent issues leading to code P1E81.

10. Is it recommended to seek professional assistance for diagnosing and repairing OBDII code P1E81 in a Saturn Hybrid/Electric Vehicle?

- Due to the complexity of hybrid/electric vehicle systems and the potential safety risks involved, it is often recommended to seek professional assistance from certified technicians or dealerships for diagnosing and repairing code P1E81.