AutoCodes – Cadillac – P1BA4 Cadillac

P1BA4 Cadillac Code - Hybrid/Electric Vehicle Battery 64 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: P1BA4 Cadillac indicates Hybrid/Electric Vehicle Battery 64 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 741

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 P1BA4 Cadillac 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 P1BA4 Cadillac - Hybrid/Electric Vehicle Battery 64 Circuit High Voltage - AutoCodes.com — P1BA4 Cadillac Code - Hybrid/Electric Vehicle Battery 64 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BA4 Cadillac?

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

How to Fix the DTC P1BA4 Cadillac?

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 P1BA4 Cadillac 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 P1BA4 Cadillac Code

1. What are the common symptoms of OBDII code P1BA4 in a Cadillac hybrid/electric vehicle?

- Common symptoms include decreased fuel efficiency, reduced performance, warning lights on the dashboard, and difficulty starting the vehicle.

2. What are some possible causes of the OBDII code P1BA4 in a Cadillac hybrid/electric vehicle?

- Possible causes include a faulty high-voltage battery, damaged wiring in the high-voltage circuit, issues with the battery management system, or a malfunctioning battery control module.

3. How can I diagnose the OBDII code P1BA4 in my Cadillac hybrid/electric vehicle?

- Diagnosing this code typically requires specialized diagnostic equipment that can interface with the vehicle's hybrid/electric system. It is recommended to have the vehicle inspected by a qualified technician.

4. Can I continue to drive my Cadillac with the OBDII code P1BA4 present?

- It is not recommended to continue driving the vehicle with this code present, as it could lead to further damage to the high-voltage system and potentially pose a safety risk. It is best to have the issue addressed promptly.

5. Are there any DIY repair tips for fixing the OBDII code P1BA4 in a Cadillac hybrid/electric vehicle?

- Due to the complexity of the high-voltage system in hybrid/electric vehicles, DIY repairs are not recommended. It is best to have the vehicle serviced by a qualified technician with experience working on hybrid/electric systems.

6. How much does it typically cost to repair the OBDII code P1BA4 in a Cadillac hybrid/electric vehicle?

- The cost of repair can vary depending on the specific cause of the code and the extent of the damage. Repairs involving the high-voltage system can be expensive, so it is advisable to get a thorough diagnosis and estimate from a professional technician.

7. Is the OBDII code P1BA4 specific to Cadillac vehicles, or can it occur in other hybrid/electric vehicles?

- The OBDII code P1BA4 is specific to Cadillac vehicles and relates to the hybrid/electric vehicle battery 64 circuit high voltage. Other manufacturers may have different codes for similar issues in their hybrid/electric vehicles.

8. How can I prevent the OBDII code P1BA4 from occurring in my Cadillac hybrid/electric vehicle?

- Regular maintenance and inspections of the high-voltage system, including the battery and wiring, can help prevent issues that may trigger the P1BA4 code. Following the manufacturer's recommended maintenance schedule is key.

9. Will resetting the OBDII code P1BA4 clear the issue in my Cadillac hybrid/electric vehicle?

- Resetting the code may temporarily clear the warning lights, but it will not address the underlying issue causing the code to appear. It is important to diagnose and repair the root cause of the problem to prevent it from recurring.

10. Can the OBDII code P1BA4 be related to a software issue in the hybrid/electric vehicle system?

- Yes, in some cases, the P1BA4 code can be triggered by a software glitch in the hybrid/electric vehicle system. Updating the software or reprogramming the control modules may be necessary to resolve the issue.