AutoCodes – Buick – P1BBF Buick

P1BBF Buick Code - Hybrid/Electric Vehicle Battery 73 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: P1BBF Buick indicates Hybrid/Electric Vehicle Battery 73 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 794

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BBF Buick 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 P1BBF Buick - Hybrid/Electric Vehicle Battery 73 Circuit High Voltage - AutoCodes.com — P1BBF Buick Code - Hybrid/Electric Vehicle Battery 73 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BBF Buick?

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

How to Fix the DTC P1BBF Buick?

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 P1BBF Buick 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 P1BBF Buick Code

1. What does the OBDII code P1BBF mean on a Buick?

The P1BBF code indicates a "Hybrid/Electric Vehicle Battery 73 Circuit High Voltage" issue, typically related to a problem in the high-voltage battery system or its associated circuitry.

2. What are the common symptoms of the P1BBF code in a Buick?

Symptoms may include a check engine light, reduced hybrid/electric performance, limited electric driving range, or the vehicle entering a limp mode.

3. What causes the P1BBF code in a Buick?

Possible causes include faulty high-voltage battery cells, damaged wiring or connectors in the circuit, a malfunctioning battery control module, or internal electrical faults.

4. Can I drive my Buick with the P1BBF code?

It is not recommended to drive with this code as it may lead to further damage to the hybrid system or reduced vehicle performance.

5. How is the P1BBF code diagnosed in a Buick?

A technician will use a scan tool to check for related codes, inspect the high-voltage battery and its connections, and perform voltage and continuity tests on the affected circuit.

6. How do you fix the P1BBF code on a Buick?

Repairs may include replacing damaged wiring, repairing or replacing the high-voltage battery, or reprogramming or replacing the battery control module.

7. What tools are needed to diagnose the P1BBF code?

Tools typically include an OBDII scanner, a multimeter for voltage testing, and manufacturer-specific diagnostic software for hybrid systems.

8. Is the P1BBF code specific to Buick hybrid vehicles?

Yes, the P1BBF code is specific to hybrid or electric Buick vehicles, as it pertains to the high-voltage battery system.

9. How much does it cost to repair the P1BBF code in a Buick?

Repair costs can vary widely, ranging from $100 for minor wiring repairs to over $1,000 for battery or module replacement.

10. Can a low 12V battery cause the P1BBF code in a Buick?

While unlikely, a weak 12V battery can sometimes cause communication or diagnostic errors, so itâ€™s worth testing the 12V system as part of the diagnosis.