AutoCodes – Generic – P1BA1

P1BA1 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 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 4,498

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

What does this mean?

What are the Possible Causes of the DTC P1BA1?

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

How to Fix the DTC P1BA1?

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 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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Need Help with the Code?

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Information for Specific Makes

P1BA1 Buick — Hybrid/Electric Vehicle Battery 63 Circuit High Voltage
P1BA1 Cadillac — Hybrid/Electric Vehicle Battery 63 Circuit High Voltage
P1BA1 Chevrolet — Hybrid/Electric Vehicle Battery 63 Circuit High Voltage
P1BA1 GMC — Hybrid/Electric Vehicle Battery 63 Circuit High Voltage
P1BA1 Saturn — Hybrid/Electric Vehicle Battery 63 Circuit High Voltage

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 Code

1. What are the common symptoms of OBDII code P1BA1 (Hybrid/Electric Vehicle Battery 63 Circuit High Voltage)?

- Common symptoms include the illumination of the check engine light, reduced fuel efficiency, and potential drivability issues.

2. What are the possible causes of OBDII code P1BA1?

- Possible causes of this code include a malfunction in the high-voltage circuit within the hybrid/electric vehicle battery system.

3. Can driving with OBDII code P1BA1 pose any risks?

- Driving with this code may pose risks such as potential damage to the vehicle's battery system or other electrical components.

4. How can I diagnose OBDII code P1BA1?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, followed by inspecting the high-voltage circuit for any visible damage or issues.

5. Is it safe to continue driving my vehicle with OBDII code P1BA1?

- It is generally not recommended to continue driving the vehicle with this code, as it can lead to further electrical issues or damage.

6. How can I repair OBDII code P1BA1?

- Repairing this code often involves addressing the underlying issue in the high-voltage circuit, which may require professional diagnosis and repair by a qualified technician.

7. Are there any DIY tips for troubleshooting OBDII code P1BA1?

- DIY troubleshooting tips may include checking for loose connections, inspecting wiring for damage, and ensuring proper grounding in the high-voltage circuit.

8. Can resetting the OBDII system clear code P1BA1?

- Resetting the OBDII system may temporarily clear the code, but it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

9. How much does it cost to fix OBDII code P1BA1?

- The cost of fixing this code can vary depending on the specific issue with the high-voltage circuit and the labor rates of the repair shop or dealership.

10. Can OBDII code P1BA1 be a recurring problem in hybrid/electric vehicles?

- Yes, this code can be a recurring problem in hybrid/electric vehicles if the underlying issue in the high-voltage circuit is not properly addressed and repaired.