AutoCodes – Chevrolet – P1B86 Chevrolet

P1B86 Chevrolet Code - Hybrid/Electric Vehicle Battery 54 Circuit High Voltage

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: P1B86 Chevrolet indicates Hybrid/Electric Vehicle Battery 54 Circuit High Voltage.
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 878

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B86 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 P1B86 Chevrolet - Hybrid/Electric Vehicle Battery 54 Circuit High Voltage - AutoCodes.com — P1B86 Chevrolet Code - Hybrid/Electric Vehicle Battery 54 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B86 Chevrolet?

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

How to Fix the DTC P1B86 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 P1B86 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 P1B86 Chevrolet Code

What does the OBDII code P1B86 mean for a Chevrolet vehicle?

The code P1B86 indicates an issue with the Hybrid/Electric Vehicle Battery 54 Circuit having a high voltage condition, typically in vehicles equipped with hybrid or electric powertrains.

What are common symptoms of the P1B86 code in a Chevrolet?

Symptoms may include warning lights on the dashboard, reduced fuel efficiency, limited electric drive functionality, or a loss of power from the hybrid/electric system.

What causes the P1B86 code in a Chevrolet?

The code can be caused by a faulty battery module, damaged wiring or connectors in the high voltage circuit, or issues with the hybrid battery control module.

Can the P1B86 code affect the performance of the vehicle?

Yes, this code can impact the vehicle's hybrid or electric functionality, leading to reduced performance and potential drivability issues.

How can I diagnose the P1B86 code in my Chevrolet?

Diagnosis involves checking the battery module, inspecting the wiring and connectors for damage, and using a scan tool to monitor the hybrid battery control module's data.

Is it safe to drive with the P1B86 code active?

Driving with this code is not recommended as it may lead to further damage or reduced performance of the hybrid/electric system.

How can the P1B86 code be fixed in a Chevrolet?

Repairs might include replacing the faulty battery module, repairing damaged wiring, or recalibrating the hybrid battery control module.

Can the P1B86 code be cleared without fixing the issue?

Clearing the code without addressing the underlying issue may only provide a temporary fix, and the code is likely to return.

What tools are needed to troubleshoot the P1B86 code?

A professional-grade scan tool capable of reading hybrid/electric system data and basic diagnostic tools like a multimeter are required.

How much does it cost to repair the P1B86 code in a Chevrolet?

Repair costs vary depending on the root cause but can range from a few hundred dollars for wiring repairs to several thousand dollars for battery module replacement.