AutoCodes – GMC – P1BF0 GMC

P1BF0 GMC Code - Hybrid/Electric Vehicle Battery 90 Circuit Performance

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: P1BF0 GMC indicates Hybrid/Electric Vehicle Battery 90 Circuit Performance.
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 1,110

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 P1BF0 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 P1BF0 GMC - Hybrid/Electric Vehicle Battery 90 Circuit Performance - AutoCodes.com — P1BF0 GMC Code - Hybrid/Electric Vehicle Battery 90 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BF0 GMC?

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

How to Fix the DTC P1BF0 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 P1BF0 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 P1BF0 GMC Code

1. What are the common symptoms of OBDII code P1BF0 in a GMC hybrid/electric vehicle?

- Common symptoms include reduced electric range, decreased hybrid system performance, and potential illumination of the check engine light.

2. What could cause the OBDII code P1BF0 to appear in a GMC hybrid/electric vehicle?

- This code typically indicates a performance issue with the 90 circuit of the hybrid/electric vehicle's battery, which can be caused by wiring faults, battery module issues, or internal battery problems.

3. How serious is the OBDII code P1BF0 in a GMC hybrid/electric vehicle?

- This code should be addressed promptly as it can affect the overall performance and efficiency of the hybrid/electric system, potentially leading to more severe issues if left unresolved.

4. Can I continue driving my GMC hybrid/electric vehicle with the OBDII code P1BF0 present?

- It is not recommended to continue driving the vehicle with this code, as it can impact the hybrid/electric system's functionality and may lead to further damage if ignored.

5. What are some DIY repair tips for addressing the OBDII code P1BF0 in a GMC hybrid/electric vehicle?

- DIY repair options may include checking and securing battery connections, inspecting wiring harnesses for damage, and ensuring the battery modules are properly seated.

6. How can a professional mechanic diagnose and repair the OBDII code P1BF0 in a GMC hybrid/electric vehicle?

- A qualified mechanic can use specialized diagnostic equipment to pinpoint the exact cause of the code, perform voltage tests on the battery components, and replace any faulty parts as needed.

7. Is it safe to reset the OBDII code P1BF0 in a GMC hybrid/electric vehicle without addressing the underlying issue?

- It is not recommended to simply reset the code without diagnosing and fixing the root cause, as the problem will likely reoccur and potentially lead to more severe issues down the line.

8. How much does it typically cost to repair the OBDII code P1BF0 in a GMC hybrid/electric vehicle?

- Repair costs can vary depending on the exact cause of the issue, but they may range from a few hundred to a few thousand dollars, especially if battery components need to be replaced.

9. Can extreme weather conditions affect the appearance of the OBDII code P1BF0 in a GMC hybrid/electric vehicle?

- Yes, extreme temperatures can sometimes exacerbate battery-related issues, potentially leading to the triggering of this code in hybrid/electric vehicles.

10. How can I prevent the OBDII code P1BF0 from appearing in my GMC hybrid/electric vehicle in the future?

- Regular maintenance, including checking and ensuring the integrity of the battery components, keeping the vehicle in a moderate temperature environment, and addressing any issues promptly, can help prevent the recurrence of this code.