AutoCodes – GMC – P1BA1 GMC

P1BA1 GMC Code - Hybrid/Electric Vehicle Battery 63 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: P1BA1 GMC indicates Hybrid/Electric Vehicle Battery 63 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 1,728

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 P1BA1 GMC 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 P1BA1 GMC - Hybrid/Electric Vehicle Battery 63 Circuit High Voltage - AutoCodes.com — P1BA1 GMC Code - Hybrid/Electric Vehicle Battery 63 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BA1 GMC?

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

How to Fix the DTC P1BA1 GMC?

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 P1BA1 GMC 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 P1BA1 GMC Code

What does the OBDII code P1BA1 mean for GMC vehicles?

The OBDII code P1BA1 indicates a high voltage issue in the hybrid or electric vehicle battery's 63 circuit, often related to the battery management system.

What are the common symptoms of a P1BA1 code?

Common symptoms include warning lights on the dashboard, reduced power output, poor fuel efficiency (in hybrid vehicles), and potential overheating of the battery.

What could cause the P1BA1 code to trigger?

Causes can include a faulty battery module, damaged wiring in the high voltage circuit, issues with the battery management system, or a failed battery cooling system.

How can I diagnose the P1BA1 code?

To diagnose the P1BA1 code, use an OBDII scanner to confirm the code, inspect the battery and its connections for any visible damage, and check the battery management system for proper function.

What repairs are typically needed for a P1BA1 code?

Repair options may include replacing the faulty battery module, repairing damaged wiring, resetting the battery management system, or replacing the entire battery if it's deemed defective.

Can I drive my vehicle with a P1BA1 code?

It is not recommended to drive the vehicle with a P1BA1 code, as it may lead to further damage to the battery system or result in reduced performance.

Is the P1BA1 code serious?

Yes, the P1BA1 code is considered serious, as it indicates a potential issue with the high voltage battery, which is critical for the operation of hybrid and electric vehicles.

How much does it typically cost to repair the P1BA1 code?

Repair costs can vary widely depending on the specific issue but may range from a few hundred to several thousand dollars, especially if a battery replacement is needed.

Will clearing the P1BA1 code fix the issue?

Clearing the code will not fix the underlying issue. The root cause must be diagnosed and repaired to prevent the code from returning.