AutoCodes – Chevrolet – P0B43 Chevrolet

P0B43 Chevrolet Code - Hybrid/Electric Vehicle Battery 2 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: P0B43 Chevrolet indicates Hybrid/Electric Vehicle Battery 2 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 960

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B43 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 P0B43 Chevrolet - Hybrid/Electric Vehicle Battery 2 Circuit High Voltage - AutoCodes.com — P0B43 Chevrolet Code - Hybrid/Electric Vehicle Battery 2 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B43 Chevrolet?

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

How to Fix the DTC P0B43 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 P0B43 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 P0B43 Chevrolet Code

1. What are the common symptoms of OBDII code P0B43 in a Chevrolet hybrid/electric vehicle?

- Common symptoms include the illumination of the check engine light, reduced vehicle performance, and potential issues with the hybrid/electric propulsion system.

2. What can cause the OBDII code P0B43 to trigger in a Chevrolet hybrid/electric vehicle?

- This code is typically triggered by a high voltage condition detected in the Hybrid/Electric Vehicle Battery 2 circuit, which may be caused by a faulty battery cell, wiring issues, or a problem with the battery management system.

3. How serious is the OBDII code P0B43 in a Chevrolet hybrid/electric vehicle?

- This code should be addressed promptly as it can affect the vehicle's performance and potentially lead to further damage to the hybrid/electric system if left unresolved.

4. Can I continue driving my Chevrolet hybrid/electric vehicle with the OBDII code P0B43 present?

- It is not recommended to drive the vehicle with this code present, as it can impact the vehicle's operation and potentially cause further damage. It's best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose and repair OBDII code P0B43 in my Chevrolet hybrid/electric vehicle?

- Diagnosis typically involves using a scan tool to retrieve the code and performing further testing to pinpoint the exact cause. Repair may involve replacing faulty battery cells, addressing wiring issues, or resetting the battery management system.

6. Is it safe to attempt DIY repairs for the OBDII code P0B43 in a Chevrolet hybrid/electric vehicle?

- Due to the high voltage nature of hybrid/electric vehicle systems, it is recommended to seek professional assistance for diagnosing and repairing this code to ensure safety and proper handling of the components involved.

7. Will resetting the OBDII code P0B43 in my Chevrolet hybrid/electric vehicle make the issue go away?

- Resetting the code may temporarily turn off the check engine light, but it will not address the underlying issue causing the high voltage condition in the Hybrid/Electric Vehicle Battery 2 circuit.

8. How can regular maintenance help prevent OBDII code P0B43 in a Chevrolet hybrid/electric vehicle?

- Regularly scheduled maintenance, including checking the battery's health and monitoring the hybrid/electric system, can help detect potential issues early and prevent the triggering of this code.

9. Is the repair for OBDII code P0B43 in a Chevrolet hybrid/electric vehicle costly?

- The cost of repair can vary depending on the exact cause of the issue. It's best to have the vehicle diagnosed by a qualified technician to get an accurate estimate for the repair.

10. Can OBDII code P0B43 recur in a Chevrolet hybrid/electric vehicle after it has been repaired?

- If the underlying cause of the code is not properly addressed during the repair, there is a possibility for it to recur. It's important to ensure that all related components are thoroughly inspected and repaired to prevent future occurrences.