AutoCodes – GMC – P1BFD GMC

P1BFD GMC Code - Hybrid/Electric Vehicle Battery 94 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: P1BFD GMC indicates Hybrid/Electric Vehicle Battery 94 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 818

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 P1BFD 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 P1BFD GMC - Hybrid/Electric Vehicle Battery 94 Circuit Low Voltage - AutoCodes.com — P1BFD GMC Code - Hybrid/Electric Vehicle Battery 94 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BFD GMC?

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

How to Fix the DTC P1BFD 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 P1BFD 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 P1BFD GMC Code

1. What are the common symptoms of OBDII code P1BFD in a GMC Hybrid/Electric Vehicle?

- Common symptoms include poor fuel efficiency, reduced power output, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P1BFD indicating Hybrid/Electric Vehicle Battery 94 Circuit Low Voltage in a GMC?

- Possible causes may include a failing hybrid/electric vehicle battery, issues with the battery management system, or wiring faults.

3. How can I diagnose the root cause of OBDII code P1BFD in my GMC Hybrid/Electric Vehicle?

- It is recommended to perform a thorough inspection of the hybrid/electric vehicle battery, check for any visible damage or corrosion, and use a diagnostic scan tool to analyze the battery voltage levels.

4. Can driving with OBDII code P1BFD present cause further damage to the vehicle?

- Continuing to drive with this code present can potentially lead to more severe issues with the hybrid/electric system and should be addressed promptly.

5. What are some repair tips for fixing OBDII code P1BFD in a GMC Hybrid/Electric Vehicle?

- Repair tips may include replacing the faulty battery cells, repairing any damaged wiring connections, or resetting the battery management system.

6. Is it safe to attempt DIY repairs for OBDII code P1BFD in a GMC Hybrid/Electric Vehicle?

- While some basic troubleshooting and repairs can be done by DIY enthusiasts, it is recommended to seek professional help for complex issues related to the hybrid/electric system.

7. How much does it typically cost to repair OBDII code P1BFD indicating Hybrid/Electric Vehicle Battery 94 Circuit Low Voltage in a GMC?

- Repair costs can vary depending on the extent of the damage and the specific components needing replacement, but it is advisable to budget for potentially significant expenses.

8. Are there any preventive maintenance measures to avoid encountering OBDII code P1BFD in a GMC Hybrid/Electric Vehicle?

- Regularly checking the battery health, following the manufacturer's maintenance schedule, and avoiding deep discharges can help prevent issues leading to this code.

9. Can resetting the OBDII system clear the P1BFD code in a GMC Hybrid/Electric Vehicle?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear.

10. How urgent is it to address OBDII code P1BFD in a GMC Hybrid/Electric Vehicle?

- It is recommended to address this code promptly to prevent further damage to the hybrid/electric system and ensure the vehicle operates safely and efficiently.