AutoCodes – Generic – P1BF2

P1BF2 Code - Hybrid/Electric Vehicle Battery 90 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: P1BF2 indicates Hybrid/Electric Vehicle Battery 90 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 837

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 P1BF2 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 P1BF2 - Hybrid/Electric Vehicle Battery 90 Circuit High Voltage - AutoCodes.com — P1BF2 Code - Hybrid/Electric Vehicle Battery 90 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BF2?

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

How to Fix the DTC P1BF2?

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 P1BF2 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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Need Help with the Code?

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Information for Specific Makes

P1BF2 Buick — Hybrid/Electric Vehicle Battery 90 Circuit High Voltage
P1BF2 Cadillac — Hybrid/Electric Vehicle Battery 90 Circuit High Voltage
P1BF2 Chevrolet — Hybrid/Electric Vehicle Battery 90 Circuit High Voltage
P1BF2 GMC — Hybrid/Electric Vehicle Battery 90 Circuit High Voltage
P1BF2 Saturn — Hybrid/Electric Vehicle Battery 90 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 P1BF2 Code

1. What are common symptoms of OBDII code P1BF2 (Hybrid/Electric Vehicle Battery 90 Circuit High Voltage)?

- Common symptoms include the check engine light coming on, reduced vehicle performance, and potential issues with the hybrid/electric vehicle's battery system.

2. What are possible causes of OBDII code P1BF2?

- Possible causes may include a faulty high voltage battery pack, issues with the battery management system, damaged wiring or connectors, or a malfunctioning hybrid system control module.

3. How can I diagnose the cause of OBDII code P1BF2?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code and further testing the high voltage battery pack, inspecting wiring and connectors, and checking the hybrid system components for any faults.

4. Is it safe to continue driving with OBDII code P1BF2 present?

- It is not recommended to continue driving with this code present, as it may indicate a potential high voltage issue that could pose a safety risk. It is best to have the vehicle inspected and repaired promptly.

5. How can I repair OBDII code P1BF2?

- Repairing this code may involve replacing the high voltage battery pack, repairing or replacing damaged wiring or connectors, resetting the battery management system, or addressing any issues with the hybrid system components.

6. Can I reset OBDII code P1BF2 without fixing the underlying issue?

- While you can clear the code using a diagnostic scanner, it is crucial to address the underlying issue causing the code to prevent further damage or safety risks associated with high voltage systems in hybrid/electric vehicles.

7. Are there any maintenance tips to prevent OBDII code P1BF2 from recurring?

- Regularly maintaining the high voltage battery system, checking for any signs of wear or damage in the wiring and connectors, and following the manufacturer's recommended service schedule can help prevent this code from recurring.

8. Will OBDII code P1BF2 affect the fuel efficiency of a hybrid/electric vehicle?

- Yes, this code can potentially affect the fuel efficiency and overall performance of a hybrid/electric vehicle due to disruptions in the high voltage system, which plays a crucial role in powering the vehicle.

9. Can OBDII code P1BF2 be triggered by extreme weather conditions?

- Extreme weather conditions may indirectly trigger this code if they cause damage to the high voltage battery system or related components. It is essential to inspect the system for any weather-related issues if this code appears.

10. Is it necessary to take my hybrid/electric vehicle to a specialized mechanic for OBDII code P1BF2 diagnosis and repair?

- Due to the complexity of high voltage systems in hybrid/electric vehicles, it is advisable to take your vehicle to a specialized mechanic or dealership with experience in servicing these vehicles for proper diagnosis and repair of OBDII code P1BF2.