AutoCodes – Chevrolet – P1B8E Chevrolet

P1B8E Chevrolet Code - Hybrid/Electric Vehicle Battery 57 Circuit Low 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: P1B8E Chevrolet indicates Hybrid/Electric Vehicle Battery 57 Circuit Low 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 1,044

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 P1B8E 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 P1B8E Chevrolet - Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage - AutoCodes.com — P1B8E Chevrolet Code - Hybrid/Electric Vehicle Battery 57 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B8E Chevrolet?

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

How to Fix the DTC P1B8E 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 P1B8E 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 P1B8E Chevrolet Code

1. What are the common symptoms of OBDII code P1B8E in a Chevrolet hybrid/electric vehicle?

The common symptoms include reduced power, poor fuel efficiency, illuminated check engine light, and potential issues with the hybrid/electric battery system.

2. What can cause the OBDII code P1B8E to trigger in a Chevrolet hybrid/electric vehicle?

The code P1B8E typically triggers due to low voltage in the Hybrid/Electric Vehicle Battery 57 Circuit, which may be caused by a failing battery cell, faulty battery management system, or wiring issues.

3. How serious is the OBDII code P1B8E in a Chevrolet hybrid/electric vehicle?

The P1B8E code should be addressed promptly to prevent further damage to the hybrid/electric battery system and ensure optimal vehicle performance.

4. Can I continue driving my Chevrolet hybrid/electric vehicle with the OBDII code P1B8E present?

It is not recommended to drive the vehicle with the P1B8E code active, as it can lead to further issues and potentially leave you stranded.

5. How can I diagnose and repair the OBDII code P1B8E in my Chevrolet hybrid/electric vehicle?

Diagnosing and repairing the P1B8E code requires specialized diagnostic equipment to pinpoint the exact cause, which may involve testing the battery cells, inspecting the wiring, and checking the battery management system.

6. Is it safe to attempt DIY repairs for the OBDII code P1B8E in a Chevrolet hybrid/electric vehicle?

Due to the complexity of hybrid/electric vehicle systems, it is recommended to seek professional assistance when dealing with the P1B8E code to ensure proper diagnosis and repair.

7. How much does it typically cost to fix the OBDII code P1B8E in a Chevrolet hybrid/electric vehicle?

The cost of repairing the P1B8E code can vary depending on the root cause of the issue, but it may involve battery cell replacement, system recalibration, or wiring repairs, which can range from a few hundred to a few thousand dollars.

8. Are there any preventive measures to avoid the OBDII code P1B8E in a Chevrolet hybrid/electric vehicle?

Regular maintenance of the hybrid/electric battery system, including monitoring voltage levels and addressing any warning signs promptly, can help prevent the occurrence of the P1B8E code.

9. Can the OBDII code P1B8E be intermittent in a Chevrolet hybrid/electric vehicle?

Yes, the P1B8E code can sometimes be intermittent, especially if the underlying issue is related to wiring connections or intermittent battery cell performance.

10. Will resetting the OBDII code P1B8E in my Chevrolet hybrid/electric vehicle make it go away permanently?

Simply resetting the code may temporarily clear the check engine light, but the underlying issue causing the P1B8E code will persist until properly diagnosed and repaired.