AutoCodes – GMC – P1E81 GMC

P1E81 GMC 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 GMC 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 854

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

What does this mean?

What are the Possible Causes of the DTC P1E81 GMC?

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

How to Fix the DTC P1E81 GMC?

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 GMC 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 GMC Code

1. What are common symptoms of OBDII code P1E81 GMC related to the Hybrid/Electric Vehicle Battery 86 Circuit?

- Common symptoms include decreased fuel efficiency, hybrid system warning lights on the dashboard, and potential inability to start the vehicle.

2. What are the possible causes of OBDII code P1E81 GMC indicating an issue with the Hybrid/Electric Vehicle Battery 86 Circuit?

- The code could be triggered by issues such as a faulty hybrid battery pack, damaged wiring in the circuit, or a problem with the battery management system.

3. How can I diagnose the OBDII code P1E81 GMC related to the Hybrid/Electric Vehicle Battery 86 Circuit?

- Diagnosis typically involves using a diagnostic scanner to read the code, inspecting the hybrid battery pack and related wiring for damage, and testing the battery management system.

4. Can I still drive my vehicle with OBDII code P1E81 GMC present indicating a problem with the Hybrid/Electric Vehicle Battery 86 Circuit?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid system and potentially cause safety issues.

5. What are some repair tips for fixing OBDII code P1E81 GMC in relation to the Hybrid/Electric Vehicle Battery 86 Circuit?

- Repair tips may include repairing or replacing damaged wiring, replacing the hybrid battery pack if necessary, and resetting the battery management system.

6. Is it possible to reset OBDII code P1E81 GMC indicating an issue with the Hybrid/Electric Vehicle Battery 86 Circuit without fixing the underlying problem?

- While you can clear the code using a diagnostic scanner, it is crucial to address the root cause of the issue to prevent further damage and ensure the hybrid system functions properly.

7. How much does it typically cost to repair OBDII code P1E81 GMC related to the Hybrid/Electric Vehicle Battery 86 Circuit?

- The cost of repairs can vary depending on the specific issue, but it may range from a few hundred to a few thousand dollars, especially if the hybrid battery pack needs replacement.

8. Are there any common DIY fixes for OBDII code P1E81 GMC associated with the Hybrid/Electric Vehicle Battery 86 Circuit?

- DIY fixes may include checking and tightening loose wiring connections, cleaning corroded terminals, and ensuring the hybrid battery pack is securely in place.

9. Can extreme weather conditions impact OBDII code P1E81 GMC related to the Hybrid/Electric Vehicle Battery 86 Circuit?

- Yes, extreme temperatures can affect the performance of the hybrid battery pack and may contribute to triggering the code. It's essential to monitor the battery in such conditions.

10. How often should I have the hybrid system inspected to prevent OBDII code P1E81 GMC indicating an issue with the Hybrid/Electric Vehicle Battery 86 Circuit?

- It is recommended to have the hybrid system inspected regularly as part of routine maintenance, especially if you notice any warning signs or changes in performance.