AutoCodes – Chevrolet – P1BFA Chevrolet

P1BFA Chevrolet 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 Chevrolet 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.

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Code Popularity 918

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

What does this mean?

What are the Possible Causes of the DTC P1BFA Chevrolet?

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

How to Fix the DTC P1BFA 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 P1BFA 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 P1BFA Chevrolet Code

1. What does the OBDII code P1BFA mean on a Chevrolet?

P1BFA indicates a low voltage issue in the "Hybrid/Electric Vehicle Battery 93 Circuit," often related to a specific cell or module in the battery pack.

2. What are the common symptoms of a P1BFA code in a Chevrolet?

Symptoms include reduced hybrid or electric vehicle performance, warning lights on the dashboard, and potential loss of electric mode operation.

3. What causes the P1BFA code in a Chevrolet hybrid or EV?

The code can be caused by a faulty battery cell, corroded or damaged wiring, poor electrical connections, or a malfunctioning battery control module.

4. Can a weak 12V battery cause the P1BFA code?

While unlikely, a weak 12V battery could indirectly affect the system. However, this code specifically refers to the high-voltage hybrid battery system.

5. How is P1BFA diagnosed in a Chevrolet vehicle?

Technicians use a scan tool to read the code, inspect the battery and related wiring, and may test the voltage of individual battery cells or modules.

6. Can I continue driving with a P1BFA code?

Itâ€™s not recommended to drive with this code, as it indicates a potential issue with the hybrid battery that could worsen and lead to reduced vehicle performance or failure.

7. How do you fix a Chevrolet with the P1BFA code?

Repairs may include replacing a faulty battery module, cleaning or repairing corroded wiring, or reprogramming the battery control module.

8. Is P1BFA covered under a hybrid battery warranty?

If your vehicle is still under the hybrid battery warranty, the repair may be covered. Check with your dealer for warranty details.

9. How much does it cost to repair the P1BFA code in a Chevrolet?

Repair costs vary but can range from a few hundred dollars for wiring repairs to several thousand for battery module replacement, depending on the issue.

10. Can a software update fix the P1BFA code?

In some cases, a software update to the battery control module may resolve the issue, but this depends on the root cause of the problem.