AutoCodes – Generic – P1BFA

P1BFA Code - Hybrid/Electric Vehicle Battery 93 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: P1BFA indicates Hybrid/Electric Vehicle Battery 93 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 901

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1BFA 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 P1BFA - Hybrid/Electric Vehicle Battery 93 Circuit Low Voltage - AutoCodes.com — P1BFA Code - Hybrid/Electric Vehicle Battery 93 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BFA?

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

How to Fix the DTC P1BFA?

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 P1BFA 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 P1BFA code?

Need more information on how to fix the P1BFA code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1BFA code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BFA Buick — Hybrid/Electric Vehicle Battery 93 Circuit Low Voltage
P1BFA Cadillac — Hybrid/Electric Vehicle Battery 93 Circuit Low Voltage
P1BFA Chevrolet — Hybrid/Electric Vehicle Battery 93 Circuit Low Voltage
P1BFA GMC — Hybrid/Electric Vehicle Battery 93 Circuit Low Voltage
P1BFA Saturn — Hybrid/Electric Vehicle Battery 93 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 P1BFA Code

1. What are the common symptoms of OBDII code P1BFA (Hybrid/Electric Vehicle Battery 93 Circuit Low Voltage)?

- The common symptoms include decreased fuel efficiency, loss of power, and issues with starting the vehicle.

2. What are the possible causes of OBDII code P1BFA?

- The code P1BFA can be triggered by a faulty battery pack, damaged battery cells, loose electrical connections, or a malfunctioning battery management system.

3. How can I diagnose the underlying issue causing code P1BFA?

- Diagnosis typically involves inspecting the battery pack, testing individual battery cells, checking for loose connections, and using a diagnostic scanner to analyze the battery management system.

4. Can I still drive my vehicle with code P1BFA present?

- It is not recommended to drive the vehicle with code P1BFA present, as the low voltage condition can lead to further damage to the hybrid/electric vehicle components.

5. How can I repair OBDII code P1BFA at home?

- Repairing code P1BFA may involve tightening loose connections, replacing damaged battery cells, or resetting the battery management system. However, it is advisable to seek professional help for proper diagnosis and repair.

6. Is it safe to reset the OBDII code P1BFA without fixing the underlying issue?

- It is not recommended to simply reset the code without addressing the underlying issue, as the low voltage condition can pose safety risks and may lead to further damage to the vehicle's components.

7. Can a low voltage condition trigger other OBDII codes besides P1BFA?

- Yes, a low voltage condition in the hybrid/electric vehicle battery system can trigger other related codes such as P1BFB (Hybrid/Electric Vehicle Battery 93 Circuit High Voltage) or P1BFC (Hybrid/Electric Vehicle Battery 93 Circuit Open).

8. How much does it typically cost to repair OBDII code P1BFA at a professional auto repair shop?

- The cost of repairing code P1BFA can vary depending on the exact cause of the issue, but it may range from a few hundred to a few thousand dollars, especially if battery cell replacement or battery pack repair is needed.

9. Are there any preventive maintenance tips to avoid OBDII code P1BFA in hybrid/electric vehicles?

- To prevent code P1BFA, it is recommended to follow the manufacturer's maintenance schedule for the hybrid/electric vehicle battery system, regularly inspect the battery pack, and address any issues promptly to avoid voltage fluctuations.

10. Can a DIY enthusiast without specialized hybrid/electric vehicle knowledge repair OBDII code P1BFA?

- While some basic troubleshooting and repairs like checking connections can be done by a DIY enthusiast, it is advisable to seek professional help for diagnosing and repairing OBDII code P1BFA in hybrid/electric vehicles due to the complex nature of the battery system.