AutoCodes – Buick – P1BB1 Buick

P1BB1 Buick Code - Hybrid/Electric Vehicle Battery 69 Circuit Performance

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: P1BB1 Buick indicates Hybrid/Electric Vehicle Battery 69 Circuit Performance.
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 839

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 P1BB1 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 P1BB1 Buick - Hybrid/Electric Vehicle Battery 69 Circuit Performance - AutoCodes.com — P1BB1 Buick Code - Hybrid/Electric Vehicle Battery 69 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BB1 Buick?

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

How to Fix the DTC P1BB1 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 P1BB1 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 P1BB1 Buick Code

What does OBDII code P1BB1 mean for my Buick?

OBDII code P1BB1 indicates a problem with the Hybrid/Electric Vehicle Battery 69 circuit performance, specifically related to the battery management system.

What are the common symptoms of a P1BB1 code?

Common symptoms may include reduced hybrid system performance, warning lights on the dashboard, or failure of the vehicle to enter electric mode.

What could cause the P1BB1 code to trigger?

Possible causes include a faulty battery management module, damaged wiring or connectors in the battery circuit, or a failing hybrid battery pack.

How can I diagnose the P1BB1 code effectively?

To diagnose the P1BB1 code, use a professional OBD-II scanner to check for additional codes, inspect battery connections and wiring, and test the battery management system.

Is it safe to drive my Buick with a P1BB1 code?

While it may be safe to drive short distances, it is advisable to have the issue addressed promptly to avoid potential damage to the hybrid system and ensure optimal vehicle performance.

What repair options are available for a P1BB1 code?

Repairs can include replacing or repairing damaged wiring, replacing the battery management module, or servicing the hybrid battery pack.

Can I clear the P1BB1 code myself?

Yes, you can clear the P1BB1 code using an OBD-II scanner, but if the underlying issue is not resolved, the code will likely reappear.

How much might it cost to fix the issues related to the P1BB1 code?

Repair costs can vary widely depending on the specific cause, ranging from a few hundred dollars for wiring repairs to several thousand for hybrid battery replacement.

Should I take my vehicle to a dealership for P1BB1 code issues?

While you can take your vehicle to a dealership, qualified automotive technicians specializing in hybrid systems can also effectively diagnose and repair the issue.