AutoCodes – Generic – P1BF8

P1BF8 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 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 1,102

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

What does this mean?

What are the Possible Causes of the DTC P1BF8?

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

How to Fix the DTC P1BF8?

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 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.

Need more information about the P1BF8 code?

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Need Help with the Code?

Get the P1BF8 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BF8 Buick — Hybrid/Electric Vehicle Battery 92 Circuit High Voltage
P1BF8 Cadillac — Hybrid/Electric Vehicle Battery 92 Circuit High Voltage
P1BF8 Chevrolet — Hybrid/Electric Vehicle Battery 92 Circuit High Voltage
P1BF8 GMC — Hybrid/Electric Vehicle Battery 92 Circuit High Voltage
P1BF8 Saturn — Hybrid/Electric Vehicle Battery 92 Circuit High Voltage

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 Code

1. What does the OBDII code P1BF8 mean?

The P1BF8 code indicates a high voltage issue in the Hybrid/Electric Vehicle Battery 92 Circuit, often related to faults in the battery pack or its electrical connections.

2. What are the common symptoms of the P1BF8 code?

Symptoms may include the check engine light turning on, reduced hybrid or electric vehicle performance, limited battery charging, or the vehicle entering limp mode.

3. What can cause the P1BF8 code to appear?

Common causes include faulty battery cells, damaged wiring or connectors in the circuit, defective battery control modules, or excessive corrosion in the high-voltage system.

4. Can driving with the P1BF8 code cause further damage?

Yes, continuing to drive with this code active can worsen battery health or damage other components in the high-voltage system, potentially leading to more expensive repairs.

5. How is the P1BF8 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the hybrid battery pack and its circuits, check for loose or corroded connections, and perform voltage and resistance tests.

6. What repairs are needed to fix the P1BF8 code?

Repairs may include replacing damaged battery cells, repairing or replacing wiring and connectors, cleaning corroded contacts, or updating the battery management system software.

7. Can a weak 12V battery trigger the P1BF8 code?

While unlikely, a weak 12V battery can sometimes affect the communication or performance of the hybrid battery system, so it should be tested as part of the diagnosis.

8. How much does it cost to fix the P1BF8 code?

Repair costs can range from $200 for simple wiring repairs to over $1,000 if the battery pack or control module needs replacement.

9. Is the P1BF8 code specific to certain vehicles?

The P1BF8 code is typically found in hybrid or electric vehicles from manufacturers like GM, Ford, and others with advanced battery management systems.

10. Can the P1BF8 code be cleared without repairs?

Clearing the code without addressing the root cause will only temporarily turn off the check engine light, and the code is likely to return during operation.