AutoCodes – Chevrolet – P1B8F Chevrolet

P1B8F Chevrolet Code - Hybrid/Electric Vehicle Battery 57 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: P1B8F Chevrolet indicates Hybrid/Electric Vehicle Battery 57 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 839

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 P1B8F 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 P1B8F Chevrolet - Hybrid/Electric Vehicle Battery 57 Circuit High Voltage - AutoCodes.com — P1B8F Chevrolet Code - Hybrid/Electric Vehicle Battery 57 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B8F Chevrolet?

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

How to Fix the DTC P1B8F 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 P1B8F 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 P1B8F Chevrolet Code

1. What are common symptoms of OBDII code P1B8F for Chevrolet Hybrid/Electric vehicles?

- Common symptoms include reduced hybrid system performance, illuminated warning lights on the dashboard related to the high voltage battery, and potential drivability issues.

2. What can cause the OBDII code P1B8F in a Chevrolet Hybrid/Electric vehicle?

- The code P1B8F is typically triggered by a high voltage circuit fault within the hybrid/electric vehicle battery system, which can be caused by issues such as a faulty battery cell, damaged wiring, or a malfunctioning battery management system.

3. How serious is the OBDII code P1B8F for a Chevrolet Hybrid/Electric vehicle?

- The P1B8F code indicates a high voltage circuit high voltage issue, which can potentially pose a safety risk due to the high voltage nature of the system. It is recommended to address this issue promptly to prevent further damage or safety hazards.

4. Can I continue driving my Chevrolet Hybrid/Electric vehicle with the P1B8F trouble code present?

- It is not advisable to continue driving the vehicle with the P1B8F trouble code present, as it can lead to further damage to the high voltage battery system and potentially compromise the safety of the vehicle.

5. How can I diagnose and repair the OBDII code P1B8F in my Chevrolet Hybrid/Electric vehicle?

- Diagnosis of the P1B8F code typically involves using a professional diagnostic scan tool to pinpoint the exact cause of the high voltage circuit fault. Repair may involve replacing damaged wiring, faulty battery cells, or addressing issues with the battery management system.

6. Are there any safety precautions to take when dealing with the P1B8F trouble code in a Chevrolet Hybrid/Electric vehicle?

- When working on the high voltage system of a hybrid/electric vehicle, it is crucial to follow all safety procedures outlined in the vehicle's service manual. This may include wearing insulated gloves, disabling the high voltage system, and avoiding contact with exposed high voltage components.

7. Can a DIY enthusiast attempt to fix the P1B8F trouble code in a Chevrolet Hybrid/Electric vehicle?

- Due to the complex and potentially dangerous nature of high voltage systems in hybrid/electric vehicles, it is recommended to seek professional assistance or take the vehicle to a certified technician for diagnosis and repair of the P1B8F trouble code.

8. How often does the OBDII code P1B8F occur in Chevrolet Hybrid/Electric vehicles?

- The P1B8F trouble code is relatively rare but can occur in Chevrolet Hybrid/Electric vehicles with high voltage battery systems. Prompt diagnosis and repair are essential to ensure the vehicle's safety and performance.

9. What are the typical costs associated with repairing the P1B8F trouble code in a Chevrolet Hybrid/Electric vehicle?

- The cost of repairing the P1B8F trouble code can vary depending on the exact cause of the fault and the extent of the repairs needed. Costs may include parts replacement, labor fees, and diagnostic charges, so it is advisable to obtain a quote from a qualified technician.

10. Can the P1B8F trouble code be a recurring issue in Chevrolet Hybrid/Electric vehicles?

- If the root cause of the high voltage circuit fault triggering the P1B8F code is not properly addressed during repairs, it is possible for the issue to recur. Thorough diagnosis and quality repairs are essential to prevent the code from reoccurring.