AutoCodes – Generic – P1BA7

P1BA7 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 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 4,577

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

What does this mean?

What are the Possible Causes of the DTC P1BA7?

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

How to Fix the DTC P1BA7?

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 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?

Get the P1BA7 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BA7 Buick — Hybrid/Electric Vehicle Battery 65 Circuit High Voltage
P1BA7 Cadillac — Hybrid/Electric Vehicle Battery 65 Circuit High Voltage
P1BA7 Chevrolet — Hybrid/Electric Vehicle Battery 65 Circuit High Voltage
P1BA7 GMC — Hybrid/Electric Vehicle Battery 65 Circuit High Voltage
P1BA7 Saturn — Hybrid/Electric Vehicle Battery 65 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 P1BA7 Code

1. What are common symptoms of OBDII code P1BA7 (Hybrid/Electric Vehicle Battery 65 Circuit High Voltage)?

- Common symptoms include the check engine light illuminating, reduced hybrid/electric vehicle performance, and potential issues with regenerative braking.

2. What are the possible causes of OBDII code P1BA7?

- Possible causes include a malfunctioning high-voltage battery pack, issues with the battery management system, faulty sensors, or electrical wiring problems.

3. How serious is OBDII code P1BA7 (Hybrid/Electric Vehicle Battery 65 Circuit High Voltage)?

- This code should be addressed promptly as it indicates a potential issue with the high-voltage system of the hybrid/electric vehicle, which can impact overall vehicle performance and safety.

4. Can I continue driving my vehicle with OBDII code P1BA7 present?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage to the high-voltage system and potentially pose safety risks.

5. How can OBDII code P1BA7 be diagnosed?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the code, followed by a thorough inspection of the high-voltage battery pack, sensors, and related components for any signs of damage or malfunction.

6. What are some repair tips for addressing OBDII code P1BA7?

- Repair tips may include checking and cleaning electrical connections, inspecting and testing the high-voltage battery pack, resetting the fault code, and if necessary, seeking assistance from a qualified technician.

7. Is it safe to attempt DIY repairs for OBDII code P1BA7?

- Due to the high-voltage nature of the components involved, DIY repairs are not recommended for OBDII code P1BA7. It is best to seek professional help to ensure safety and proper repair procedures.

8. How much does it cost to repair OBDII code P1BA7?

- The cost of repairing OBDII code P1BA7 can vary depending on the underlying cause of the issue, the extent of the damage, and whether any parts need to be replaced. It is advisable to get a diagnostic assessment from a qualified technician for an accurate estimate.

9. Can OBDII code P1BA7 be prevented?

- While some causes of this code may be unavoidable, regular maintenance and inspections of the high-voltage system in hybrid/electric vehicles can help prevent issues that may trigger OBDII code P1BA7.

10. Are there any recalls or technical service bulletins related to OBDII code P1BA7?

- It is recommended to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to OBDII code P1BA7, as they may provide valuable information or solutions for addressing the issue.