AutoCodes – Generic – P1E86

P1E86 Code - Hybrid/Electric Vehicle Battery 91 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: P1E86 indicates Hybrid/Electric Vehicle Battery 91 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 1,231

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 Apr 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E86 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 P1E86 - Hybrid/Electric Vehicle Battery 91 Circuit - AutoCodes.com — P1E86 Code - Hybrid/Electric Vehicle Battery 91 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E86?

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

How to Fix the DTC P1E86?

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 P1E86 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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Information for Specific Makes

P1E86 Buick — Hybrid/Electric Vehicle Battery 91 Circuit
P1E86 Cadillac — Hybrid/Electric Vehicle Battery 91 Circuit
P1E86 Chevrolet — Hybrid/Electric Vehicle Battery 91 Circuit
P1E86 GMC — Hybrid/Electric Vehicle Battery 91 Circuit
P1E86 Saturn — Hybrid/Electric Vehicle Battery 91 Circuit

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 P1E86 Code

1. What are the common symptoms of OBDII code P1E86 (Hybrid/Electric Vehicle Battery 91 Circuit)?

- Common symptoms include the hybrid/electric vehicle not starting, reduced power performance, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P1E86?

- The code P1E86 may be triggered by issues such as a faulty hybrid/electric vehicle battery, damaged wiring in circuit 91, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P1E86?

- Diagnosing code P1E86 typically involves using a diagnostic scanner to retrieve the code, inspecting the hybrid/electric vehicle battery connections, and testing the circuit 91 components for continuity.

4. Is it safe to continue driving with OBDII code P1E86?

- It is not recommended to continue driving with code P1E86 present, as it can lead to further damage to the hybrid/electric vehicle battery system and affect the vehicle's performance and safety.

5. What are some repair tips for OBDII code P1E86?

- Repair tips for code P1E86 may include checking and repairing any damaged wiring in circuit 91, testing and replacing a faulty hybrid/electric vehicle battery, and resetting the fault code using a diagnostic scanner.

6. Can a DIY enthusiast fix OBDII code P1E86 at home?

- While some basic troubleshooting steps can be performed at home, diagnosing and repairing code P1E86 may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

7. How much does it cost to repair OBDII code P1E86?

- The cost of repairing code P1E86 can vary depending on the underlying cause, parts needed for replacement, and labor costs. It is advisable to obtain quotes from different repair shops for an accurate estimate.

8. Will resetting the fault code make OBDII code P1E86 go away permanently?

- Resetting the fault code may temporarily clear the check engine light, but if the underlying issue causing code P1E86 is not addressed and repaired, the code is likely to reappear.

9. Can extreme weather conditions affect OBDII code P1E86?

- Extreme weather conditions such as extreme heat or cold can potentially impact the performance of the hybrid/electric vehicle battery, which could lead to issues triggering code P1E86.

10. How often should I have the hybrid/electric vehicle battery system inspected to prevent OBDII code P1E86?

- It is recommended to have the hybrid/electric vehicle battery system inspected regularly as part of routine maintenance to detect any potential issues early and prevent the occurrence of code P1E86.