AutoCodes – Chevrolet – P1BF8 Chevrolet

P1BF8 Chevrolet Code - Hybrid/Electric Vehicle Battery 92 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: P1BF8 Chevrolet indicates Hybrid/Electric Vehicle Battery 92 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 906

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 P1BF8 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 P1BF8 Chevrolet - Hybrid/Electric Vehicle Battery 92 Circuit High Voltage - AutoCodes.com — P1BF8 Chevrolet Code - Hybrid/Electric Vehicle Battery 92 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF8 Chevrolet?

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

How to Fix the DTC P1BF8 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 P1BF8 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 P1BF8 Chevrolet Code

1. What are the common symptoms of OBDII code P1BF8 in a Chevrolet hybrid/electric vehicle?

- The common symptoms include illuminated check engine light, reduced power or performance, and potential issues with the hybrid/electric vehicle battery system.

2. What can cause the OBDII code P1BF8 indicating a Hybrid/Electric Vehicle Battery 92 Circuit High Voltage in a Chevrolet?

- This code is typically triggered by a malfunction in the high voltage circuit of the hybrid/electric vehicle battery, which can be caused by wiring issues, a faulty battery cell, or problems with the battery management system.

3. How serious is the OBDII code P1BF8 in a Chevrolet hybrid/electric vehicle?

- This code should be addressed promptly as it pertains to the high voltage circuit of the hybrid/electric vehicle battery. Ignoring this issue can lead to further damage to the battery system and potentially unsafe operating conditions.

4. Can I continue driving my Chevrolet hybrid/electric vehicle with the OBDII code P1BF8 present?

- It is not recommended to drive the vehicle with this code active, as it indicates a potential issue with the high voltage circuit of the battery system. Continuing to drive may exacerbate the problem and pose safety risks.

5. How can I diagnose and repair the OBDII code P1BF8 in my Chevrolet hybrid/electric vehicle?

- Diagnosis typically involves inspecting the high voltage circuit, checking for damaged wiring or faulty battery components. Repair may involve fixing wiring issues, replacing defective battery cells, or recalibrating the battery management system.

6. Is it safe to attempt DIY repairs for the OBDII code P1BF8 in a Chevrolet hybrid/electric vehicle?

- Due to the high voltage nature of the battery system, it is recommended to seek professional assistance for diagnosing and repairing this code to ensure safety and proper handling of components.

7. How much does it cost to fix the OBDII code P1BF8 in a Chevrolet hybrid/electric vehicle?

- The cost of repair can vary depending on the underlying issue causing the code. It is advisable to consult with a qualified mechanic or dealership for an accurate diagnosis and cost estimate.

8. Can resetting the OBDII code P1BF8 in a Chevrolet hybrid/electric vehicle make it go away permanently?

- Simply resetting the code may temporarily clear the check engine light, but it will not fix the underlying issue causing the code. Proper diagnosis and repair are necessary to prevent the code from reappearing.

9. Are there any preventive maintenance steps to avoid encountering the OBDII code P1BF8 in a Chevrolet hybrid/electric vehicle?

- Regularly inspecting the high voltage circuit, following manufacturer-recommended maintenance schedules, and addressing any battery-related issues promptly can help prevent the occurrence of this code.

10. Can the OBDII code P1BF8 in a Chevrolet hybrid/electric vehicle be related to other codes or issues in the vehicle?

- While this code specifically relates to the high voltage circuit of the battery system, it is advisable to scan for other related codes and perform a comprehensive diagnosis to ensure all potential issues are addressed.