AutoCodes – Chevrolet – P1E81 Chevrolet

P1E81 Chevrolet 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 Chevrolet 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 872

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

What does this mean?

What are the Possible Causes of the DTC P1E81 Chevrolet?

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

How to Fix the DTC P1E81 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 P1E81 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 P1E81 Chevrolet Code

1. What are the common symptoms of OBDII code P1E81 in a Chevrolet hybrid/electric vehicle?

- Common symptoms include reduced power and performance, illuminated check engine light, and potential battery charging issues.

2. What are the possible causes of OBDII code P1E81 in a Chevrolet hybrid/electric vehicle?

- The code P1E81 typically indicates a fault in the Hybrid/Electric Vehicle Battery 86 Circuit, which can be caused by issues such as a faulty battery pack, damaged wiring, or a malfunctioning battery management system.

3. How can I diagnose OBDII code P1E81 in my Chevrolet hybrid/electric vehicle?

- Diagnosing this code usually involves using a professional OBDII scanner to retrieve the specific fault codes, inspecting the battery and related components for physical damage, and testing the circuitry for continuity and proper voltage.

4. Is it safe to continue driving my Chevrolet hybrid/electric vehicle with OBDII code P1E81 present?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the battery system and potentially pose a safety risk. It's best to have the issue diagnosed and repaired as soon as possible.

5. Can I repair OBDII code P1E81 in my Chevrolet hybrid/electric vehicle myself?

- While some DIY enthusiasts may attempt to troubleshoot and repair this code, it is recommended to seek professional help, especially when dealing with high-voltage systems like hybrid/electric vehicle batteries. Specialized knowledge and tools are often required for proper diagnosis and repair.

6. How much does it typically cost to repair OBDII code P1E81 in a Chevrolet hybrid/electric vehicle?

- The cost of repairing this code can vary depending on the exact cause of the issue. It may range from a few hundred dollars for minor repairs to over a thousand dollars for more complex battery pack replacements or repairs.

7. Can a faulty sensor trigger OBDII code P1E81 in a Chevrolet hybrid/electric vehicle?

- While a faulty sensor is not a common cause of this specific code, it's always a good idea to inspect and test sensors related to the battery system to rule out any potential contributing factors.

8. Will disconnecting the hybrid/electric vehicle battery reset OBDII code P1E81?

- Disconnecting the battery may temporarily clear the code, but it will not fix the underlying issue causing the fault. It's best to diagnose and repair the problem to prevent the code from reoccurring.

9. Are there any maintenance tips to prevent OBDII code P1E81 from appearing in a Chevrolet hybrid/electric vehicle?

- Regularly inspecting the battery system, keeping up with recommended maintenance schedules, and avoiding extreme temperature conditions can help prevent issues that may trigger this fault code.

10. How long does it take to repair OBDII code P1E81 in a Chevrolet hybrid/electric vehicle?

- The repair time can vary depending on the complexity of the issue. Simple fixes like resetting the system or replacing a fuse may take a short time, while more involved repairs could require several hours or even days if parts need to be ordered.