AutoCodes – Chevrolet – P0B4C Chevrolet

P0B4C Chevrolet Code - Hybrid/Electric Vehicle Battery 4 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: P0B4C Chevrolet indicates Hybrid/Electric Vehicle Battery 4 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 921

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 P0B4C 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 P0B4C Chevrolet - Hybrid/Electric Vehicle Battery 4 Circuit Low Voltage - AutoCodes.com — P0B4C Chevrolet Code - Hybrid/Electric Vehicle Battery 4 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0B4C Chevrolet?

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

How to Fix the DTC P0B4C 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 P0B4C 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 P0B4C Chevrolet Code

1. What are the common symptoms of OBDII code P0B4C in a Chevrolet hybrid/electric vehicle?

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

2. What are the possible causes of OBDII code P0B4C indicating Hybrid/Electric Vehicle Battery 4 Circuit Low Voltage in a Chevrolet?

- Possible causes include a faulty hybrid battery cell, issues with the battery management system, wiring harness problems, or a malfunctioning battery control module.

3. How can I diagnose the source of OBDII code P0B4C in my Chevrolet hybrid/electric vehicle?

- A thorough diagnostic procedure may involve testing the individual battery cells, checking the battery voltage levels, inspecting the wiring connections, and using a scan tool to retrieve specific data from the hybrid system.

4. Is it safe to continue driving my Chevrolet hybrid/electric vehicle with OBDII code P0B4C present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/electric components and potentially compromise the vehicle's safety and performance.

5. Can I reset OBDII code P0B4C in my Chevrolet hybrid/electric vehicle by disconnecting the battery?

- While disconnecting the battery may temporarily clear the code, it is crucial to address the underlying issue causing the fault code to prevent it from reoccurring.

6. How much does it typically cost to repair OBDII code P0B4C related to Hybrid/Electric Vehicle Battery 4 Circuit Low Voltage in a Chevrolet?

- Repair costs can vary depending on the exact cause of the issue, but it may involve battery replacement, system recalibration, or module reprogramming, which can range from a few hundred to a few thousand dollars.

7. Are there any preventive maintenance tips to avoid OBDII code P0B4C in a Chevrolet hybrid/electric vehicle?

- Regularly maintaining the hybrid battery system, ensuring proper charging habits, and promptly addressing any warning signs or dashboard messages related to the hybrid system can help prevent issues leading to this fault code.

8. Can a DIY enthusiast with automotive knowledge repair OBDII code P0B4C in a Chevrolet hybrid/electric vehicle?

- While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing complex hybrid/electric system issues like this code may require specialized tools, expertise, and safety precautions best handled by professionals.

9. Will OBDII code P0B4C affect the overall drivability of my Chevrolet hybrid/electric vehicle?

- OBDII code P0B4C indicating Hybrid/Electric Vehicle Battery 4 Circuit Low Voltage can impact the drivability by reducing performance, fuel efficiency, and potentially causing the vehicle to operate in a restricted mode to protect the hybrid system.

10. How long does it typically take to repair OBDII code P0B4C in a Chevrolet hybrid/electric vehicle?

- The repair time can vary depending on the complexity of the issue, availability of parts, and the specific diagnosis required, but it may take several hours to a few days to fully address and clear the fault code.