AutoCodes – Buick – P1BFD Buick

P1BFD Buick 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 Buick 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 857

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

What does this mean?

What are the Possible Causes of the DTC P1BFD Buick?

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

How to Fix the DTC P1BFD Buick?

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 Buick 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 Buick Code

1. What does OBDII code P1BFD mean on a Buick?

P1BFD indicates a low voltage issue in the Hybrid/Electric Vehicle Battery 94 Circuit, which is part of the battery control system.

2. What are common symptoms of the P1BFD code in a Buick?

Symptoms may include a warning light on the dashboard, reduced hybrid/electric performance, poor fuel economy, or the vehicle operating only in gas mode.

3. What causes the P1BFD code to appear?

Common causes include a faulty battery module, damaged wiring or connectors in the circuit, or an issue with the battery control module.

4. Can I drive my Buick with the P1BFD code active?

While the vehicle may still be drivable, driving with this code can lead to further damage or reduced hybrid/electric functionality. Itâ€™s best to address the issue promptly.

5. How is the P1BFD code diagnosed?

A technician will use a scan tool to identify the code, inspect the battery pack and related wiring, and test the circuit for proper voltage and continuity.

6. Can a low 12-volt battery cause the P1BFD code?

Itâ€™s unlikely, as this code specifically pertains to the high-voltage hybrid/electric battery system, not the 12-volt accessory battery.

7. What repairs can fix the P1BFD code?

Repairs may involve replacing a damaged battery module, repairing or replacing faulty wiring/connectors, or reprogramming the battery control module.

8. How much does it cost to repair the P1BFD code on a Buick?

Repair costs vary depending on the issue. Minor wiring repairs may cost around $100â€“$300, while battery module replacement can be significantly more expensive, ranging from $1,000â€“$5,000.

9. Can I reset the P1BFD code without fixing the issue?

Clearing the code without addressing the cause will likely result in the code returning, as the underlying problem remains unresolved.

10. Is the P1BFD code covered under warranty?

Hybrid/electric vehicle battery and control system components may be covered under a specific warranty, depending on the vehicleâ€™s age and mileage. Check with your dealer for details.