AutoCodes – Buick – P1BA4 Buick

P1BA4 Buick Code - Hybrid/Electric Vehicle Battery 64 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: P1BA4 Buick indicates Hybrid/Electric Vehicle Battery 64 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 864

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 P1BA4 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 P1BA4 Buick - Hybrid/Electric Vehicle Battery 64 Circuit High Voltage - AutoCodes.com — P1BA4 Buick Code - Hybrid/Electric Vehicle Battery 64 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BA4 Buick?

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

How to Fix the DTC P1BA4 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 P1BA4 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 P1BA4 Buick Code

1. What are common symptoms of OBDII code P1BA4 in a Buick Hybrid/Electric Vehicle?

The common symptoms of code P1BA4 include poor fuel efficiency, reduced power output, and the illumination of the check engine light.

2. What does the OBDII code P1BA4 indicate in a Buick Hybrid/Electric Vehicle?

Code P1BA4 indicates a high voltage condition in the 64th circuit of the vehicle's hybrid/electric battery system.

3. What are the possible causes of OBDII code P1BA4 in a Buick Hybrid/Electric Vehicle?

Possible causes of code P1BA4 include a faulty high voltage battery cell, damaged wiring in the 64th circuit, or a malfunctioning battery management system.

4. How can I diagnose OBDII code P1BA4 in my Buick Hybrid/Electric Vehicle?

Diagnosing code P1BA4 typically involves using a diagnostic scanner to retrieve the code, inspecting the high voltage battery system for visible damage, and testing the circuitry for continuity.

5. Is it safe to continue driving with OBDII code P1BA4 present in a Buick Hybrid/Electric Vehicle?

It is not recommended to continue driving with code P1BA4 present, as it can lead to further damage to the hybrid/electric battery system and potentially unsafe driving conditions.

6. Can I repair OBDII code P1BA4 in my Buick Hybrid/Electric Vehicle myself?

Repairing code P1BA4 often requires specialized knowledge and equipment related to hybrid/electric vehicle systems. It is advisable to seek professional assistance for diagnosing and repairing this issue.

7. How much does it typically cost to repair OBDII code P1BA4 in a Buick Hybrid/Electric Vehicle?

The cost of repairing code P1BA4 can vary depending on the extent of the issue and the specific repairs needed. It is recommended to obtain quotes from reputable automotive technicians or dealerships.

8. Are there any preventive maintenance tips to avoid OBDII code P1BA4 in a Buick Hybrid/Electric Vehicle?

To help prevent code P1BA4, it is important to regularly maintain the hybrid/electric battery system according to the manufacturer's recommendations and address any warning signs promptly.

9. Can OBDII code P1BA4 in a Buick Hybrid/Electric Vehicle cause other electrical problems in the vehicle?

Code P1BA4 itself may not directly cause other electrical problems, but it is indicative of an issue within the high voltage battery system that could potentially lead to further electrical complications if left unresolved.

10. How long does it typically take to repair OBDII code P1BA4 in a Buick Hybrid/Electric Vehicle?

The repair time for code P1BA4 can vary depending on the exact cause of the issue and the availability of parts. It is advisable to consult with a qualified technician for an estimate of the repair timeline.