AutoCodes – Chevrolet – P1BA7 Chevrolet

P1BA7 Chevrolet Code - Hybrid/Electric Vehicle Battery 65 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: P1BA7 Chevrolet indicates Hybrid/Electric Vehicle Battery 65 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 934

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 P1BA7 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 P1BA7 Chevrolet - Hybrid/Electric Vehicle Battery 65 Circuit High Voltage - AutoCodes.com — P1BA7 Chevrolet Code - Hybrid/Electric Vehicle Battery 65 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BA7 Chevrolet?

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

How to Fix the DTC P1BA7 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 P1BA7 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 P1BA7 Chevrolet Code

What does the OBDII code P1BA7 mean for a Chevrolet vehicle?

P1BA7 indicates a problem with the hybrid or electric vehicle's battery, specifically that the 65 circuit is experiencing high voltage.

What are common symptoms associated with the P1BA7 code?

Common symptoms include reduced vehicle performance, warning lights on the dashboard, and potential issues with the hybrid/electric system's operation.

What might cause the P1BA7 code to trigger?

Causes can include a malfunctioning battery pack, issues with the battery management system, faulty wiring, or a defective voltage sensor.

How serious is the P1BA7 code?

The P1BA7 code can be serious as it may indicate a risk of battery failure, which can lead to decreased performance or safety hazards. Immediate attention is recommended.

Can I continue to drive my Chevrolet if the P1BA7 code is present?

It is not advisable to drive the vehicle until the issue is diagnosed and resolved, as it could lead to further damage to the hybrid/electric system.

What are some potential repair solutions for the P1BA7 code?

Repairs may include replacing the battery pack, repairing or replacing faulty wiring, or updating the battery management software.

Is it necessary to reset the OBDII system after repairs for code P1BA7?

Yes, after resolving the issue, resetting the OBDII system is necessary to clear the code and ensure the vehicle's onboard systems function correctly.

How can I diagnose the cause of the P1BA7 code?

Use an OBDII scanner to read the code and any related codes, then perform a visual inspection of the battery and wiring, and check the battery management system's parameters.

Should I consult a professional mechanic for code P1BA7?

Yes, consulting a professional mechanic is recommended, as they have the tools and expertise to accurately diagnose and repair hybrid/electric vehicle issues.