AutoCodes – Chevrolet – P1B1A Chevrolet

P1B1A Chevrolet Code - Hybrid/Electric Vehicle Battery 28 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: P1B1A Chevrolet indicates Hybrid/Electric Vehicle Battery 28 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 800

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 P1B1A 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 P1B1A Chevrolet - Hybrid/Electric Vehicle Battery 28 Circuit Low Voltage - AutoCodes.com — P1B1A Chevrolet Code - Hybrid/Electric Vehicle Battery 28 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B1A Chevrolet?

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

How to Fix the DTC P1B1A 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 P1B1A 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 P1B1A Chevrolet Code

1. What are common symptoms of OBDII code P1B1A in a Chevrolet hybrid/electric vehicle?

- Common symptoms include warning lights illuminated on the dashboard, decreased fuel efficiency, and potential issues with the vehicle's hybrid/electric system.

2. What does the OBDII code P1B1A indicate regarding the hybrid/electric vehicle battery 28 circuit?

- The code P1B1A indicates a low voltage condition specifically in the hybrid/electric vehicle battery 28 circuit.

3. What are possible causes of the P1B1A code related to low voltage in the hybrid/electric vehicle battery?

- Potential causes include a faulty battery cell, issues with the battery management system, poor electrical connections, or a malfunctioning battery cooling system.

4. How can I diagnose the P1B1A code in my Chevrolet hybrid/electric vehicle?

- Diagnosing the code may involve using a diagnostic scanner to read the code, inspecting the battery connections, checking the battery voltage levels, and conducting a battery load test.

5. Is it safe to continue driving my Chevrolet hybrid/electric vehicle with the P1B1A code present?

- It is not recommended to continue driving the vehicle with the P1B1A code active, as it can lead to further damage to the battery system and potentially unsafe driving conditions.

6. Can I reset the P1B1A code in my Chevrolet hybrid/electric vehicle myself?

- While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair the P1B1A code in a Chevrolet hybrid/electric vehicle?

- Repair costs can vary depending on the exact cause of the code, but they may range from a few hundred to over a thousand dollars, especially if battery components need to be replaced.

8. Are there any maintenance tips to prevent the recurrence of the P1B1A code in my Chevrolet hybrid/electric vehicle?

- Regularly inspecting the battery system, keeping the cooling system in good condition, and following the manufacturer's recommended maintenance schedule can help prevent the code from reappearing.

9. Can a DIY enthusiast repair the P1B1A code in a Chevrolet hybrid/electric vehicle?

- While some simple maintenance tasks can be performed by DIY enthusiasts, diagnosing and repairing issues related to the hybrid/electric system should be left to trained professionals due to the high voltage nature of the components.

10. Will the P1B1A code affect the overall performance of my Chevrolet hybrid/electric vehicle?

- Yes, the P1B1A code can affect the performance of the vehicle by causing decreased fuel efficiency, reduced power output, and potential drivability issues.