AutoCodes – Chevrolet – P1B23 Chevrolet

P1B23 Chevrolet Code - Hybrid/Electric Vehicle Battery 31 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: P1B23 Chevrolet indicates Hybrid/Electric Vehicle Battery 31 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 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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B23 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 P1B23 Chevrolet - Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage - AutoCodes.com — P1B23 Chevrolet Code - Hybrid/Electric Vehicle Battery 31 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B23 Chevrolet?

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

How to Fix the DTC P1B23 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 P1B23 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 P1B23 Chevrolet Code

1. What are the common symptoms of OBDII code P1B23 in a Chevrolet hybrid/electric vehicle?

- Common symptoms include poor fuel economy, reduced electric range, difficulty starting the vehicle, and the illumination of the check engine light.

2. What can cause the OBDII code P1B23 in a Chevrolet hybrid/electric vehicle?

- The code P1B23 typically indicates a low voltage condition in the battery 31 circuit, which may be caused by a faulty battery cell, wiring issues, or problems with the battery management system.

3. How serious is the OBDII code P1B23 in a Chevrolet hybrid/electric vehicle?

- The code P1B23 should be addressed promptly to prevent further damage to the hybrid/electric vehicle's battery system. Ignoring this code can lead to reduced performance and potential safety hazards.

4. Can I continue driving my Chevrolet hybrid/electric vehicle with the OBDII code P1B23 present?

- It is not recommended to continue driving your vehicle with the P1B23 code, as it can lead to further damage to the battery system and potentially leave you stranded if the battery voltage drops too low.

5. How can I diagnose and repair the OBDII code P1B23 in my Chevrolet hybrid/electric vehicle?

- Diagnosing and repairing the P1B23 code requires specialized equipment and knowledge of hybrid/electric vehicle systems. It is recommended to take your vehicle to a qualified technician or dealership for diagnosis and repair.

6. Is it possible to reset the OBDII code P1B23 in a Chevrolet hybrid/electric vehicle using a diagnostic tool?

- While you may be able to clear the code temporarily using a diagnostic tool, it is crucial to address the underlying issue causing the low voltage condition to prevent the code from reoccurring.

7. Can extreme weather conditions affect the occurrence of the OBDII code P1B23 in a Chevrolet hybrid/electric vehicle?

- Yes, extreme temperatures can impact the performance of the hybrid/electric vehicle's battery system, potentially leading to a low voltage condition and triggering the P1B23 trouble code.

8. How much does it typically cost to repair the OBDII code P1B23 in a Chevrolet hybrid/electric vehicle?

- The cost of repairing the P1B23 code can vary depending on the root cause of the issue. It is advisable to consult with a professional technician for an accurate diagnosis and cost estimate.

9. Are there any preventive maintenance tips to avoid the OBDII code P1B23 in a Chevrolet hybrid/electric vehicle?

- Regularly scheduled maintenance, including battery system checks and software updates, can help prevent issues like the P1B23 trouble code in a Chevrolet hybrid/electric vehicle.

10. Is the OBDII code P1B23 specific to Chevrolet hybrid/electric vehicles, or can it occur in other brands as well?

- While the specific code P1B23 may be unique to Chevrolet vehicles, similar low voltage conditions can occur in other hybrid/electric vehicles, potentially triggering different diagnostic trouble codes.