AutoCodes – Chevrolet – P1BA0 Chevrolet

P1BA0 Chevrolet Code - Hybrid/Electric Vehicle Battery 63 Circuit Low 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: P1BA0 Chevrolet indicates Hybrid/Electric Vehicle Battery 63 Circuit Low 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 866

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 P1BA0 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 P1BA0 Chevrolet - Hybrid/Electric Vehicle Battery 63 Circuit Low Voltage - AutoCodes.com — P1BA0 Chevrolet Code - Hybrid/Electric Vehicle Battery 63 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BA0 Chevrolet?

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

How to Fix the DTC P1BA0 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 P1BA0 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 P1BA0 Chevrolet Code

What does the OBDII code P1BA0 mean on a Chevrolet?

Code P1BA0 indicates a low voltage issue in the Hybrid/Electric Vehicle Battery 63 circuit, which typically relates to the high-voltage battery or its associated wiring.

What are the common symptoms of the P1BA0 code in a Chevrolet?

Symptoms may include warning lights on the dashboard, reduced hybrid or electric performance, poor fuel efficiency, or a failure to enter EV mode.

What causes the P1BA0 code in Chevrolet hybrid or electric vehicles?

Possible causes include damaged or corroded wiring, a malfunctioning battery cell, a faulty battery control module, or poor electrical connections in the circuit.

Can I drive my Chevrolet with the P1BA0 code active?

Driving with this code is not recommended, as it may lead to further battery or system damage and reduced performance, potentially leaving the vehicle inoperable.

How is the P1BA0 code diagnosed in a Chevrolet?

A technician will use a scan tool to confirm the code, inspect wiring and connectors for damage or corrosion, and test the battery cells and control module for proper operation.

What repairs are commonly needed to fix the P1BA0 code?

Repairs may include replacing damaged wiring or connectors, repairing or replacing the affected battery cell, updating the battery control module, or replacing the module if faulty.

Can a software update fix the P1BA0 code on a Chevrolet?

In some cases, a software update for the battery control module may resolve the issue if it is related to incorrect voltage readings or system calibration.

How much does it cost to repair the P1BA0 code on a Chevrolet?

Repair costs vary widely depending on the specific issue but can range from $100 for wiring repairs to several thousand dollars for battery cell or module replacement.

Can a dead 12V battery trigger the P1BA0 code in a Chevrolet?

While unlikely, a weak or dead 12V battery can sometimes cause communication errors or false voltage readings, so testing the 12V system is recommended as part of the diagnosis.

How can I prevent the P1BA0 code from occurring in the future?

Regular maintenance, inspecting wiring for damage, and ensuring proper operation of the high-voltage battery system can help prevent this code from reoccurring.