AutoCodes – Generic – P0B4F

P0B4F Code - Hybrid/Electric Vehicle Battery 5 Circuit

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: P0B4F indicates Hybrid/Electric Vehicle Battery 5 Circuit.
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 3,946

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 P0B4F 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 P0B4F - Hybrid/Electric Vehicle Battery 5 Circuit - AutoCodes.com — P0B4F Code - Hybrid/Electric Vehicle Battery 5 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B4F?

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

How to Fix the DTC P0B4F?

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 P0B4F 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.

Need more information about the P0B4F code?

Need more information on how to fix the P0B4F code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0B4F code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0B4F Buick — Hybrid/Electric Vehicle Battery 5 Circuit
P0B4F Cadillac — Hybrid/Electric Vehicle Battery 5 Circuit
P0B4F Chevrolet — Hybrid/Electric Vehicle Battery 5 Circuit
P0B4F GMC — Hybrid/Electric Vehicle Battery 5 Circuit
P0B4F Saturn — Hybrid/Electric Vehicle Battery 5 Circuit

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 P0B4F Code

1. What are the common symptoms of OBDII code P0B4F related to Hybrid/Electric Vehicle Battery 5 Circuit?

- Common symptoms include poor hybrid/electric vehicle performance, reduced fuel efficiency, and potential inability to start the vehicle.

2. What are the possible causes of OBDII code P0B4F?

- The code P0B4F may be triggered due to issues with the hybrid/electric vehicle battery 5 circuit, such as wiring faults, damaged battery components, or a malfunctioning battery management system.

3. How can I diagnose the OBDII code P0B4F at home?

- You can perform a visual inspection of the battery and circuit connections, check for any loose wires, and use an OBDII scanner to retrieve specific error codes and data related to the Hybrid/Electric Vehicle Battery 5 Circuit.

4. What are some repair tips for addressing OBDII code P0B4F?

- Repair tips may include repairing or replacing damaged wiring, repairing or replacing faulty battery components, resetting the battery management system, or seeking professional assistance from a certified technician.

5. Can I continue driving my vehicle with OBDII code P0B4F present?

- It is not recommended to drive the vehicle with the code P0B4F present, as it can lead to further damage to the hybrid/electric vehicle system and potentially cause safety hazards.

6. How much does it typically cost to repair OBDII code P0B4F related to Hybrid/Electric Vehicle Battery 5 Circuit?

- The cost of repair can vary depending on the extent of the issue, the specific components that need to be replaced, and whether you choose to DIY or seek professional help. Costs can range from a few hundred to a few thousand dollars.

7. Are there any preventive measures to avoid OBDII code P0B4F in the future?

- Regular maintenance of the hybrid/electric vehicle system, including checking the battery connections, monitoring battery health, and following manufacturer recommendations, can help prevent issues leading to code P0B4F.

8. How long does it take to repair OBDII code P0B4F?

- The repair time for OBDII code P0B4F can vary depending on the complexity of the issue, the availability of parts, and the expertise of the technician. It may take a few hours to a few days to complete the repair.

9. Can I reset the OBDII code P0B4F myself?

- While you can clear the error code using an OBDII scanner, it is important to address the underlying issue causing the code before resetting it. Simply clearing the code without fixing the problem may result in the code reappearing.

10. Is OBDII code P0B4F specific to certain hybrid or electric vehicle models?

- OBDII code P0B4F related to Hybrid/Electric Vehicle Battery 5 Circuit can be specific to certain hybrid or electric vehicle models, so it's essential to consult your vehicle's manual or a professional technician for accurate diagnosis and repair.