AutoCodes – Buick – P1B5F Buick

P1B5F Buick Code - Hybrid/Electric Vehicle Battery 41 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: P1B5F Buick indicates Hybrid/Electric Vehicle Battery 41 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 895

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B5F Buick 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 P1B5F Buick - Hybrid/Electric Vehicle Battery 41 Circuit High Voltage - AutoCodes.com — P1B5F Buick Code - Hybrid/Electric Vehicle Battery 41 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B5F Buick?

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

How to Fix the DTC P1B5F Buick?

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 P1B5F Buick 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 P1B5F Buick Code

1. What are common symptoms of OBDII code P1B5F on a Buick Hybrid/Electric Vehicle?

- Common symptoms include check engine light illumination, reduced hybrid system performance, and potential drivability issues.

2. What does the OBDII code P1B5F Buick indicate about the Hybrid/Electric Vehicle Battery 41 Circuit High Voltage?

- This code indicates that there is a high voltage condition detected in the Hybrid/Electric Vehicle Battery 41 Circuit.

3. What are possible causes of the P1B5F Buick code related to the Hybrid/Electric Vehicle Battery?

- Potential causes may include a faulty battery pack, high voltage wiring issues, damaged battery cells, or problems with the battery management system.

4. How can I diagnose the OBDII code P1B5F on my Buick Hybrid/Electric Vehicle?

- Diagnosis typically involves using a specialized scan tool to retrieve the specific fault code, inspecting the high voltage components, and testing the battery system for abnormalities.

5. Is it safe to continue driving with the P1B5F code present on a Buick Hybrid/Electric Vehicle?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the battery system and potential safety hazards.

6. Can I reset the P1B5F Buick code myself, or do I need professional help?

- While you can attempt to clear the code with an OBDII scanner, it is essential to address the underlying issue causing the fault code to prevent future problems.

7. Are there any simple repair tips for addressing the P1B5F code on a Buick Hybrid/Electric Vehicle?

- Simple repair tips may include checking and tightening high voltage connections, inspecting for visible damage to the battery components, and ensuring proper battery cooling.

8. How much does it typically cost to repair the Hybrid/Electric Vehicle Battery 41 Circuit High Voltage issue on a Buick?

- Repair costs can vary depending on the exact cause of the issue, but they may range from a few hundred to a few thousand dollars for parts and labor.

9. Can a DIY enthusiast with some automotive knowledge fix the P1B5F code themselves?

- While some basic troubleshooting steps can be attempted, diagnosing and repairing high voltage issues in a hybrid/electric vehicle should be left to trained professionals due to the potential safety risks involved.

10. How often does the P1B5F Buick code occur in Hybrid/Electric Vehicles, and is it a common problem?

- The occurrence of this specific code can vary, but issues related to high voltage circuits in hybrid/electric vehicles are not uncommon and should be addressed promptly to avoid further complications.