AutoCodes – Buick – P1BAB Buick

P1BAB Buick Code - Hybrid/Electric Vehicle Battery 67 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: P1BAB Buick indicates Hybrid/Electric Vehicle Battery 67 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 922

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 P1BAB 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 P1BAB Buick - Hybrid/Electric Vehicle Battery 67 Circuit Performance - AutoCodes.com — P1BAB Buick Code - Hybrid/Electric Vehicle Battery 67 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BAB Buick?

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

How to Fix the DTC P1BAB 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 P1BAB 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 P1BAB Buick Code

What does the OBDII code P1BAB mean on a Buick?

1. The P1BAB code indicates a "Hybrid/Electric Vehicle Battery 67 Circuit Performance" issue, which typically refers to a problem with the performance of a specific battery circuit or module in the hybrid/electric vehicle system. 2.

What are the common symptoms of the P1BAB code?

Common symptoms include reduced fuel efficiency, limited hybrid or electric functionality, a warning light on the dashboard, and potential drivability issues such as decreased power output. 3.

What causes the P1BAB code to appear in a Buick?

The code can be triggered by issues such as a faulty hybrid battery module, damaged wiring or connectors in the battery circuit, or a malfunction in the battery control module. 4.

Can a weak 12V battery trigger the P1BAB code?

While the P1BAB code is specific to the hybrid battery system, a weak or failing 12V battery can sometimes cause related electrical issues that might affect diagnostic readings. 5.

Is it safe to drive with a P1BAB code active?

Driving with a P1BAB code may not be safe, as it could lead to reduced hybrid system performance or unexpected power loss. Itâ€™s best to address the issue promptly to avoid further complications. 6.

How is the P1BAB code diagnosed?

Technicians typically diagnose this code by using a scan tool to check for additional codes, inspecting the hybrid battery modules and wiring, and performing diagnostic tests on the battery control module. 7.

What repairs are needed to fix the P1BAB code?

Repairs may include replacing a defective hybrid battery module, repairing damaged wiring or connectors, or reprogramming or replacing the battery control module. 8.

How much does it cost to fix a P1BAB code on a Buick?

Repair costs can vary widely depending on the specific issue, ranging from $150 for wiring repairs to several thousand dollars for hybrid battery replacement. 9.

Can the P1BAB code clear itself?

The code is unlikely to clear itself unless the underlying issue is resolved. However, disconnecting the battery or using a scan tool to reset the system may temporarily clear the code. 10.

What maintenance can prevent the P1BAB code from occurring?

Regularly inspecting the hybrid battery system, ensuring proper battery cooling, and checking for damaged wiring or connectors can help prevent this code from occurring.