AutoCodes – Chevrolet – P0B81 Chevrolet

P0B81 Chevrolet Code - Hybrid/Electric Vehicle Battery 15 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: P0B81 Chevrolet indicates Hybrid/Electric Vehicle Battery 15 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 817

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B81 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 P0B81 Chevrolet - Hybrid/Electric Vehicle Battery 15 Circuit - AutoCodes.com — P0B81 Chevrolet Code - Hybrid/Electric Vehicle Battery 15 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B81 Chevrolet?

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

How to Fix the DTC P0B81 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 P0B81 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 P0B81 Chevrolet Code

1. What does OBDII code P0B81 for Chevrolet Hybrid/Electric Vehicle Battery 15 Circuit indicate?

The code P0B81 indicates a problem with the circuit 15 in the hybrid/electric vehicle battery system.

2. What are the common symptoms of OBDII code P0B81 in a Chevrolet hybrid/electric vehicle?

Common symptoms include reduced fuel economy, reduced power output, and potential issues with the vehicle's hybrid/electric system.

3. What can cause the OBDII code P0B81 to appear in a Chevrolet hybrid/electric vehicle?

Potential causes of code P0B81 include a faulty battery 15 circuit, damaged wiring, connector issues, or problems with the hybrid/electric vehicle battery itself.

4. How can I diagnose the OBDII code P0B81 in my Chevrolet hybrid/electric vehicle?

To diagnose code P0B81, it's recommended to perform a thorough inspection of the battery 15 circuit, check for any visible damage or loose connections, and use a diagnostic scanner to gather more information about the issue.

5. Is it safe to continue driving my Chevrolet hybrid/electric vehicle with the OBDII code P0B81 present?

It is not recommended to continue driving the vehicle with the P0B81 code active, as it can lead to further damage to the hybrid/electric system and potentially compromise the vehicle's overall performance.

6. How can I repair the OBDII code P0B81 in my Chevrolet hybrid/electric vehicle?

Repairing the P0B81 code may involve fixing any damaged wiring, replacing faulty connectors, or addressing issues with the battery 15 circuit as per manufacturer's recommendations.

7. Can I reset the OBDII code P0B81 in my Chevrolet hybrid/electric vehicle using a diagnostic scanner?

Yes, you can use a diagnostic scanner to reset the P0B81 code after addressing the underlying issue. However, it's essential to ensure the problem is fixed before clearing the code.

8. Are there any specific maintenance tips to prevent the recurrence of the OBDII code P0B81 in my Chevrolet hybrid/electric vehicle?

Regularly inspecting the battery 15 circuit, ensuring proper connection, and following the manufacturer's recommended maintenance schedule can help prevent the reoccurrence of the P0B81 code.

9. Can a DIY enthusiast repair the OBDII code P0B81 in a Chevrolet hybrid/electric vehicle, or is professional assistance necessary?

While some simple checks and repairs can be done by a knowledgeable DIY enthusiast, complex issues related to the hybrid/electric system may require professional assistance to ensure proper diagnosis and repair.

10. How much does it typically cost to repair the OBDII code P0B81 in a Chevrolet hybrid/electric vehicle?

The cost of repairing the P0B81 code can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It's recommended to consult with a qualified technician for a more accurate estimate.