AutoCodes – GMC – P1BF5 GMC

P1BF5 GMC Code - Hybrid/Electric Vehicle Battery 91 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: P1BF5 GMC indicates Hybrid/Electric Vehicle Battery 91 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 860

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 P1BF5 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 P1BF5 GMC - Hybrid/Electric Vehicle Battery 91 Circuit High Voltage - AutoCodes.com — P1BF5 GMC Code - Hybrid/Electric Vehicle Battery 91 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF5 GMC?

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

How to Fix the DTC P1BF5 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 P1BF5 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 P1BF5 GMC Code

1. What are the common symptoms of OBDII code P1BF5 GMC related to the Hybrid/Electric Vehicle Battery 91 Circuit High Voltage?

- Common symptoms include the check engine light illuminating, reduced hybrid system performance, and potential issues with battery charging.

2. What are some possible causes of OBDII code P1BF5 GMC indicating a Hybrid/Electric Vehicle Battery 91 Circuit High Voltage fault?

- Potential causes may include a faulty battery pack, issues with the battery management system, or wiring/connectivity problems within the hybrid system.

3. How can I diagnose the OBDII code P1BF5 GMC on my GMC hybrid or electric vehicle?

- To diagnose this code, it is recommended to use an OBDII scanner to retrieve the specific fault code, inspect the high-voltage battery components, and check for any visible signs of damage or corrosion.

4. Can driving with the OBDII code P1BF5 GMC present any risks to the vehicle or its occupants?

- Continuing to drive with this code may pose risks such as reduced power output, potential battery overheating, and further damage to the hybrid/electric system components.

5. What are some repair tips for addressing OBDII code P1BF5 GMC indicating a Hybrid/Electric Vehicle Battery 91 Circuit High Voltage issue?

- Repair tips may include checking and repairing any damaged wiring, replacing faulty battery components, resetting the fault code after repairs, and conducting a thorough system test.

6. Is it safe to attempt repairs related to the Hybrid/Electric Vehicle Battery 91 Circuit High Voltage code on my GMC vehicle?

- Due to the high-voltage nature of the hybrid/electric system, it is recommended to consult with a qualified technician or electric vehicle specialist for safe and proper repairs.

7. How can I prevent OBDII code P1BF5 GMC from reoccurring after repairs have been made?

- To prevent the code from reoccurring, ensure all repairs are completed correctly, conduct regular maintenance on the hybrid system, and monitor the vehicle for any unusual behavior.

8. Are there any recalls or service bulletins related to OBDII code P1BF5 GMC in GMC hybrid or electric vehicles?

- It is advisable to check with the manufacturer or authorized GMC service centers for any relevant recalls or service bulletins regarding this specific fault code.

9. What is the typical cost of repairing OBDII code P1BF5 GMC on a GMC hybrid or electric vehicle?

- Repair costs can vary depending on the extent of the issue, parts needed for replacement, and labor charges. It is recommended to obtain estimates from reputable repair shops.

10. Can OBDII code P1BF5 GMC be cleared/reset without addressing the underlying issue in the hybrid/electric system?

- While the code can be cleared with an OBDII scanner, it is crucial to address the root cause of the fault to prevent potential safety hazards and further damage to the vehicle.