AutoCodes – GMC – P1BF1 GMC

P1BF1 GMC Code - Hybrid/Electric Vehicle Battery 90 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: P1BF1 GMC indicates Hybrid/Electric Vehicle Battery 90 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 935

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 P1BF1 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 P1BF1 GMC - Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage - AutoCodes.com — P1BF1 GMC Code - Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF1 GMC?

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

How to Fix the DTC P1BF1 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 P1BF1 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 P1BF1 GMC Code

1. What are the common symptoms of OBDII code P1BF1 in a GMC Hybrid/Electric Vehicle?

- Common symptoms include reduced electric vehicle range, poor fuel efficiency, and potential issues with battery charging.

2. What can cause the Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage code P1BF1 in a GMC?

- Possible causes include a faulty battery cell, damaged wiring in the battery system, or issues with the battery management system.

3. How can I diagnose the Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage code P1BF1 in my GMC?

- Diagnosis typically involves using a scan tool to read the code, testing the battery voltage levels, and inspecting the battery connections for any visible damage.

4. Can I continue driving my GMC with the P1BF1 code present?

- It is not recommended to continue driving with this code present, as it can lead to further damage to the hybrid/electric vehicle system.

5. What repairs are commonly needed to fix the P1BF1 code in a GMC Hybrid/Electric Vehicle?

- Repairs may involve replacing a faulty battery cell, repairing damaged wiring, or recalibrating the battery management system.

6. How important is it to address the Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage code P1BF1 promptly?

- It is crucial to address this code promptly to prevent potential damage to the hybrid/electric vehicle battery system and ensure the vehicle's optimal performance.

7. Can I reset the P1BF1 code in my GMC Hybrid/Electric Vehicle using a simple method?

- Resetting the code may temporarily clear the error, but it is essential to diagnose and address the underlying issue to prevent the code from reoccurring.

8. Are there any maintenance tips to prevent the P1BF1 code from appearing in my GMC?

- Regularly inspecting the battery system, following the manufacturer's maintenance schedule, and avoiding overcharging the battery can help prevent the P1BF1 code.

9. Is it safe to attempt DIY repairs for the Hybrid/Electric Vehicle Battery 90 Circuit Low Voltage code P1BF1 in a GMC?

- Unless you have the necessary knowledge and experience working with hybrid/electric vehicle systems, it is recommended to seek professional assistance for repairs related to this code.

10. How long does it typically take to repair the P1BF1 code in a GMC Hybrid/Electric Vehicle?

- The repair time can vary depending on the exact cause of the code, but it may take a few hours to a day for diagnosis and repairs to be completed by a qualified technician.