AutoCodes – GMC – P1BF8 GMC

P1BF8 GMC Code - Hybrid/Electric Vehicle Battery 92 Circuit High 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: P1BF8 GMC indicates Hybrid/Electric Vehicle Battery 92 Circuit High 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 854

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 P1BF8 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 P1BF8 GMC - Hybrid/Electric Vehicle Battery 92 Circuit High Voltage - AutoCodes.com — P1BF8 GMC Code - Hybrid/Electric Vehicle Battery 92 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF8 GMC?

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

How to Fix the DTC P1BF8 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 P1BF8 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 P1BF8 GMC Code

1. What are the common symptoms of OBDII code P1BF8 GMC related to the Hybrid/Electric Vehicle Battery 92 Circuit High Voltage?

- Common symptoms may include a check engine light illuminated on the dashboard, reduced performance of the hybrid/electric vehicle, and potential issues with starting the vehicle.

2. What are the possible causes of OBDII code P1BF8 GMC indicating Hybrid/Electric Vehicle Battery 92 Circuit High Voltage?

- The code can be triggered by issues such as a faulty high-voltage battery, damaged wiring in the battery circuit, or problems with the battery management system.

3. How can I diagnose the OBDII code P1BF8 GMC associated with Hybrid/Electric Vehicle Battery 92 Circuit High Voltage?

- Diagnosis typically involves using a scan tool to read the code, checking the high-voltage battery for any visible damage, and inspecting the wiring and connections in the battery circuit.

4. Is it safe to continue driving with OBDII code P1BF8 GMC for Hybrid/Electric Vehicle Battery 92 Circuit High Voltage?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the high-voltage system and potentially pose safety risks.

5. What are the repair options for resolving OBDII code P1BF8 GMC related to Hybrid/Electric Vehicle Battery 92 Circuit High Voltage?

- Repair options may include replacing the high-voltage battery, repairing or replacing damaged wiring, and resetting the code using a scan tool after the issue has been addressed.

6. Can I reset the OBDII code P1BF8 GMC myself for Hybrid/Electric Vehicle Battery 92 Circuit High Voltage?

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

7. Are there any preventive maintenance tips to avoid OBDII code P1BF8 GMC for Hybrid/Electric Vehicle Battery 92 Circuit High Voltage?

- Regularly inspecting the high-voltage battery, ensuring proper maintenance of the hybrid/electric vehicle, and addressing any warning signs promptly can help prevent this code from appearing.

8. How long does it typically take to repair OBDII code P1BF8 GMC related to Hybrid/Electric Vehicle Battery 92 Circuit High Voltage?

- The repair time can vary depending on the specific issue causing the code, but it may take a few hours to a day for diagnosis and repair.

9. Will OBDII code P1BF8 GMC for Hybrid/Electric Vehicle Battery 92 Circuit High Voltage affect the overall drivability of the vehicle?

- Yes, this code can impact the drivability of the hybrid/electric vehicle, potentially leading to reduced performance, starting issues, and other related problems.

10. Can a professional mechanic help with diagnosing and repairing OBDII code P1BF8 GMC for Hybrid/Electric Vehicle Battery 92 Circuit High Voltage?

- Yes, a qualified mechanic with experience in hybrid/electric vehicles can diagnose the issue accurately and recommend the necessary repairs to resolve the code effectively.