AutoCodes – Chevrolet – P1B8B Chevrolet

P1B8B Chevrolet Code - Hybrid/Electric Vehicle Battery 56 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: P1B8B Chevrolet indicates Hybrid/Electric Vehicle Battery 56 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 871

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 P1B8B 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 P1B8B Chevrolet - Hybrid/Electric Vehicle Battery 56 Circuit Low Voltage - AutoCodes.com — P1B8B Chevrolet Code - Hybrid/Electric Vehicle Battery 56 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B8B Chevrolet?

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

How to Fix the DTC P1B8B 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 P1B8B 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 P1B8B Chevrolet Code

1. What are the common symptoms of OBDII code P1B8B in a Chevrolet Hybrid/Electric Vehicle?

- Common symptoms may include reduced hybrid system performance, decreased fuel efficiency, and potential issues with starting the vehicle.

2. What can cause the Hybrid/Electric Vehicle Battery 56 Circuit Low Voltage code P1B8B in a Chevrolet?

- Possible causes include a faulty hybrid battery, damaged battery wiring, poor electrical connections, or issues with the hybrid battery control module.

3. How can I diagnose the Hybrid/Electric Vehicle Battery 56 Circuit Low Voltage code in my Chevrolet?

- Diagnosis may involve using an OBDII scanner to retrieve the code, checking the hybrid battery voltage levels, inspecting the battery connections, and testing the hybrid battery cells.

4. Can I continue driving my Chevrolet with the P1B8B code present?

- It is not recommended to drive the vehicle with the code active, as it can lead to further damage to the hybrid system and potentially cause safety hazards.

5. What are some repair tips for fixing OBDII code P1B8B in a Chevrolet Hybrid/Electric Vehicle?

- Repair tips may include checking and repairing any damaged wiring, replacing the hybrid battery if necessary, ensuring proper connections, and resetting the trouble code.

6. Is it possible to reset the P1B8B code in a Chevrolet Hybrid/Electric Vehicle without repairs?

- While clearing the code may temporarily remove the warning light, it is essential to address the underlying issue causing the code to prevent further problems.

7. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 56 Circuit Low Voltage code in a Chevrolet?

- Repair costs can vary depending on the extent of the issue, but they may range from a few hundred to a few thousand dollars, especially if the hybrid battery needs replacement.

8. Are there any preventive maintenance steps to avoid encountering the P1B8B code in a Chevrolet Hybrid/Electric Vehicle?

- Regularly inspecting and maintaining the hybrid battery, ensuring good electrical connections, and following the manufacturer's recommended service schedule can help prevent this code.

9. Can a DIY enthusiast fix the OBDII code P1B8B issue in a Chevrolet Hybrid/Electric Vehicle?

- While some basic troubleshooting and repairs may be possible for DIY enthusiasts, addressing complex hybrid system issues like this code often requires specialized knowledge and tools.

10. How serious is the Hybrid/Electric Vehicle Battery 56 Circuit Low Voltage code P1B8B in a Chevrolet?

- The P1B8B code indicates a potential issue with the hybrid battery system, and if left unresolved, it can lead to performance issues, reduced fuel efficiency, and possible damage to the vehicle's components.