AutoCodes – GMC – P1BFA GMC

P1BFA GMC 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 GMC 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 968

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

What does this mean?

What are the Possible Causes of the DTC P1BFA GMC?

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

How to Fix the DTC P1BFA GMC?

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 GMC 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 GMC Code

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

- Common symptoms include loss of power, poor fuel efficiency, and difficulties starting the vehicle.

2. What can cause the OBDII code P1BFA GMC to trigger?

- The code may trigger due to a weak or failing hybrid/electric vehicle battery, issues with the battery management system, or a problem with the charging system.

3. How can I diagnose the root cause of the P1BFA code in my GMC hybrid/electric vehicle?

- Diagnostic tools such as a scan tool capable of reading hybrid vehicle codes and conducting a thorough inspection of the battery system can help pinpoint the issue.

4. Can driving with the P1BFA code triggered cause further damage to my GMC hybrid/electric vehicle?

- Continuing to drive with the code triggered can potentially lead to further damage to the hybrid/electric vehicle battery and related components.

5. What are some repair tips for addressing the P1BFA code in a GMC hybrid/electric vehicle?

- Repair tips may include checking the battery connections, inspecting the battery for signs of wear or damage, and ensuring proper charging system operation.

6. Is it safe to drive my GMC hybrid/electric vehicle with the P1BFA code present?

- It is not recommended to drive the vehicle with the P1BFA code present, as it indicates a potential issue with the battery system that can impact vehicle performance and safety.

7. Can I reset the OBDII code P1BFA in my GMC hybrid/electric vehicle using a scan tool?

- While you can clear the code using a scan tool, it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. How much does it typically cost to repair the P1BFA code in a GMC hybrid/electric vehicle?

- Repair costs can vary depending on the extent of the issue, but they may involve battery system diagnostics, repairs, or replacements, which can be expensive.

9. Are there any preventive maintenance measures I can take to avoid the P1BFA code in my GMC hybrid/electric vehicle?

- Regularly checking the battery system, keeping up with scheduled maintenance, and avoiding deep discharges of the battery can help prevent issues that trigger the P1BFA code.

10. Can a DIY enthusiast with automotive experience repair the P1BFA code in a GMC hybrid/electric vehicle?

- While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing complex battery system issues may require specialized knowledge and tools best left to professionals.