AutoCodes – Generic – P1BA2

P1BA2 Code - Hybrid/Electric Vehicle Battery 64 Circuit Performance

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: P1BA2 indicates Hybrid/Electric Vehicle Battery 64 Circuit Performance.
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 1,221

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 P1BA2 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 P1BA2 - Hybrid/Electric Vehicle Battery 64 Circuit Performance - AutoCodes.com — P1BA2 Code - Hybrid/Electric Vehicle Battery 64 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BA2?

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

How to Fix the DTC P1BA2?

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 P1BA2 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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Information for Specific Makes

P1BA2 Buick — Hybrid/Electric Vehicle Battery 64 Circuit Performance
P1BA2 Cadillac — Hybrid/Electric Vehicle Battery 64 Circuit Performance
P1BA2 Chevrolet — Hybrid/Electric Vehicle Battery 64 Circuit Performance
P1BA2 GMC — Hybrid/Electric Vehicle Battery 64 Circuit Performance
P1BA2 Saturn — Hybrid/Electric Vehicle Battery 64 Circuit Performance

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 P1BA2 Code

What does the OBDII code P1BA2 mean?

The OBDII code P1BA2 indicates a performance issue with the 64 circuit of the hybrid or electric vehicle battery, suggesting that the battery's performance is not meeting expected standards.

What symptoms might indicate a P1BA2 code?

Common symptoms include reduced power or acceleration, warning lights on the dashboard, decreased electric vehicle range, and unusual noises from the battery compartment.

What are the possible causes of a P1BA2 code?

Possible causes include a faulty battery management system, damaged wiring or connectors, a failing battery pack, or issues with the vehicle's power electronics.

How can I diagnose a P1BA2 code?

To diagnose a P1BA2 code, use an OBDII scanner to confirm the code, inspect the battery connections and wiring for damage, and check the battery's state of charge and health.

What repairs are typically needed for a P1BA2 code?

Repairs may involve replacing damaged wiring or connectors, reprogramming or replacing the battery management system, or replacing the hybrid/electric vehicle battery itself if it is found to be faulty.

Can I drive my vehicle with a P1BA2 code?

While it may be possible to drive with a P1BA2 code, it is not advisable, as it can lead to further battery degradation and potentially leave you stranded due to reduced power.

Is there a way to reset the P1BA2 code?

The P1BA2 code can be reset using an OBDII scanner after addressing the underlying issue. However, if the problem is not resolved, the code will likely return.

How much does it typically cost to repair issues related to a P1BA2 code?

Repair costs can vary widely depending on the specific issue, ranging from a few hundred dollars for minor wiring repairs to several thousand dollars for battery replacement.

Are there any preventative measures to avoid a P1BA2 code?

Regular maintenance of the battery system, including checking connections and keeping the battery charged, can help prevent issues that may lead to a P1BA2 code.

What should I do if I see the P1BA2 code along with other codes?

If the P1BA2 code appears with other codes, it is best to address all related codes as they may indicate a broader issue with the hybrid or electric vehicle systems.