AutoCodes – Chevrolet – P1BA4 Chevrolet

P1BA4 Chevrolet 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 Chevrolet 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 1,065

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

What does this mean?

What are the Possible Causes of the DTC P1BA4 Chevrolet?

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

How to Fix the DTC P1BA4 Chevrolet?

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 Chevrolet 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 Chevrolet Code

1. What does OBDII code P1BA4 mean on a Chevrolet?

P1BA4 indicates a high voltage issue in the Hybrid/Electric Vehicle Battery 64 circuit, which may involve abnormal voltage readings from the battery system.

2. What are the common symptoms of code P1BA4 in a Chevrolet?

Symptoms can include an illuminated check engine light, reduced vehicle performance, limited electric drive functionality, or a warning related to the hybrid system on the dashboard.

3. What causes the P1BA4 code to appear in a Chevrolet?

Potential causes include a faulty hybrid battery module, damaged high-voltage wiring, a malfunctioning battery control module, or poor electrical connections in the circuit.

4. Can I drive my Chevrolet with the P1BA4 code?

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

5. How is the P1BA4 code diagnosed in a Chevrolet?

Technicians use a scan tool to read live data, inspect the hybrid battery system, check for wiring damage, and test the battery control module for proper operation.

6. How do I fix the P1BA4 code on my Chevrolet?

Repairs may involve replacing a faulty battery module, repairing or replacing damaged wiring, cleaning and securing electrical connections, or reprogramming the battery control module.

7. How much does it cost to fix the P1BA4 code in a Chevrolet?

Repair costs vary but can range from $200 for wiring repairs to over $1,000 if the hybrid battery or control module needs replacement.

8. Can a weak 12V battery cause the P1BA4 code in a Chevrolet?

While unlikely, a weak or failing 12V battery can sometimes impact the hybrid system and should be tested as part of the diagnosis process.

9. Is the P1BA4 code covered under warranty for my Chevrolet?

It depends on your vehicleâ€™s warranty. Hybrid battery components are often covered under extended warranties, so check with your dealer for details.

10. How can I prevent the P1BA4 code from occurring again?

Regular maintenance, avoiding extreme temperature exposure, and promptly addressing hybrid system warnings can help prevent this code from recurring.