AutoCodes – Generic – P1BA4

P1BA4 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 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 2,088

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

What does this mean?

What are the Possible Causes of the DTC P1BA4?

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

How to Fix the DTC P1BA4?

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 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

P1BA4 Buick — Hybrid/Electric Vehicle Battery 64 Circuit High Voltage
P1BA4 Cadillac — Hybrid/Electric Vehicle Battery 64 Circuit High Voltage
P1BA4 Chevrolet — Hybrid/Electric Vehicle Battery 64 Circuit High Voltage
P1BA4 GMC — Hybrid/Electric Vehicle Battery 64 Circuit High Voltage
P1BA4 Saturn — Hybrid/Electric Vehicle Battery 64 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 P1BA4 Code

1. What are the common symptoms of OBDII code P1BA4 (Hybrid/Electric Vehicle Battery 64 Circuit High Voltage)?

- Common symptoms include the illumination of the check engine light, reduced hybrid system performance, and potential difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1BA4?

- Possible causes of this code include a malfunction in the high voltage battery circuit, a faulty battery management system, or issues with the battery control module.

3. How can I diagnose OBDII code P1BA4?

- Diagnosing this code typically involves using a scan tool to read the code, checking the high voltage battery system for any visible damage, and performing electrical tests to identify the source of the issue.

4. Can I continue driving my vehicle with OBDII code P1BA4 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the high voltage battery system and potentially compromise the safety of the vehicle.

5. What are the potential repair options for OBDII code P1BA4?

- Repair options may include replacing damaged high voltage battery components, resetting the battery management system, or recalibrating the battery control module to resolve the issue.

6. Is it safe to attempt repairs on the high voltage battery system related to OBDII code P1BA4?

- Due to the high voltage nature of the system, it is recommended to have repairs related to this code performed by a qualified technician with experience working on hybrid or electric vehicles.

7. How can I prevent OBDII code P1BA4 from recurring in the future?

- To prevent this code from recurring, regular maintenance of the high voltage battery system, including inspections and testing, is crucial to identify and address any potential issues early on.

8. Will resetting the OBDII code P1BA4 turn off the check engine light?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, the light is likely to illuminate again.

9. Can extreme weather conditions contribute to triggering OBDII code P1BA4?

- Yes, extreme temperature fluctuations can impact the performance of the high voltage battery system and potentially lead to triggering this code, especially in hybrid or electric vehicles.

10. How long does it typically take to repair OBDII code P1BA4?

- The repair time for this code can vary depending on the extent of the issue and the availability of parts, but it is advisable to consult with a professional technician for a more accurate estimate.