AutoCodes – Generic – P1BF1

P1BF1 Code - Hybrid/Electric Vehicle Battery 90 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: P1BF1 indicates Hybrid/Electric Vehicle Battery 90 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 919

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BF1 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 P1BF1 - Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage - AutoCodes.com — P1BF1 Code - Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF1?

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

How to Fix the DTC P1BF1?

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 P1BF1 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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Need Help with the Code?

Get the P1BF1 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BF1 Buick — Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage
P1BF1 Cadillac — Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage
P1BF1 Chevrolet — Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage
P1BF1 GMC — Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage
P1BF1 Saturn — Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage

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 P1BF1 Code

1. What are the common symptoms of OBDII code P1BF1 (Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage)?

- Common symptoms include poor performance of the hybrid/electric vehicle, reduced fuel efficiency, and potential issues with the battery system.

2. What are some possible causes of OBDII code P1BF1?

- Causes of this code may include a malfunctioning battery pack, issues with the battery management system, faulty wiring or connections, or a problem with the battery temperature sensor.

3. How can I diagnose the OBDII code P1BF1?

- Diagnosis typically involves using a diagnostic scan tool to retrieve the code, checking the battery voltage levels, inspecting the battery connections, and testing the battery temperature sensor.

4. What are the repair options for OBDII code P1BF1?

- Repair options may include replacing a faulty battery pack, repairing damaged wiring or connections, recalibrating the battery management system, or replacing the battery temperature sensor.

5. Can I drive my vehicle with OBDII code P1BF1?

- It is not recommended to drive your vehicle with this code active, as it can lead to further damage to the hybrid/electric vehicle system. It is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code P1BF1?

- The cost of repair can vary depending on the specific cause of the code and the extent of the damage. It is advisable to consult a professional mechanic for an accurate estimate.

7. What precautions should I take when dealing with OBDII code P1BF1?

- It is important to follow safety protocols when working with high-voltage hybrid/electric vehicle systems. Avoid touching exposed wires or components and consider seeking assistance from a qualified technician.

8. Can a DIY enthusiast fix OBDII code P1BF1 at home?

- Repairing this code may require specialized knowledge and tools, especially when dealing with high-voltage components. It is recommended to seek professional help to ensure proper diagnosis and repair.

9. How often does OBDII code P1BF1 occur in hybrid/electric vehicles?

- This code can occur in hybrid/electric vehicles when there are underlying issues with the battery system. The frequency of occurrence may vary depending on the vehicle's age and maintenance history.

10. Are there any preventative measures to avoid OBDII code P1BF1?

- Regular maintenance of the hybrid/electric vehicle's battery system, such as checking the battery health, ensuring proper connections, and following manufacturer recommendations, can help prevent issues that trigger this code.