AutoCodes – Cadillac – P1BAA Cadillac

P1BAA Cadillac Code - Hybrid/Electric Vehicle Battery 66 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: P1BAA Cadillac indicates Hybrid/Electric Vehicle Battery 66 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 784

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 P1BAA 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 P1BAA Cadillac - Hybrid/Electric Vehicle Battery 66 Circuit High Voltage - AutoCodes.com — P1BAA Cadillac Code - Hybrid/Electric Vehicle Battery 66 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1BAA Cadillac?

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

How to Fix the DTC P1BAA 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 P1BAA 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 P1BAA Cadillac Code

1. What are the common symptoms of OBDII code P1BAA in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and potentially a check engine light illuminated on the dashboard.

2. What can cause the OBDII code P1BAA in a Cadillac Hybrid/Electric Vehicle?

- The code P1BAA typically indicates a problem with the high voltage circuit in the vehicle's hybrid/electric battery system, which could be caused by issues such as a faulty battery pack, damaged wiring, or a sensor malfunction.

3. How serious is the OBDII code P1BAA in a Cadillac Hybrid/Electric Vehicle?

- The code P1BAA should be taken seriously as it directly relates to the high voltage system in the vehicle, which is critical for the proper operation of the hybrid/electric components. Ignoring this code could lead to further damage or safety hazards.

4. Can I continue driving my Cadillac Hybrid/Electric Vehicle with the OBDII code P1BAA present?

- It is not recommended to continue driving the vehicle with the code P1BAA present, as the high voltage system may not be functioning properly, potentially leading to further issues or safety concerns.

5. How can I diagnose and repair the OBDII code P1BAA in my Cadillac Hybrid/Electric Vehicle?

- Diagnosing and repairing the code P1BAA should be done by a qualified technician with experience in hybrid/electric vehicle systems. They will use specialized tools to pinpoint the exact cause of the issue and perform necessary repairs or replacements.

6. Are there any DIY repair tips for the OBDII code P1BAA in a Cadillac Hybrid/Electric Vehicle?

- Due to the complexity and safety considerations of hybrid/electric vehicle systems, DIY repair is not recommended for the OBDII code P1BAA. It's best to seek professional help to ensure the issue is properly addressed.

7. How much does it typically cost to fix the OBDII code P1BAA in a Cadillac Hybrid/Electric Vehicle?

- The cost of fixing the OBDII code P1BAA can vary depending on the specific cause of the issue and the extent of repairs needed. It's recommended to get a diagnostic assessment from a qualified technician to determine the cost accurately.

8. Can the OBDII code P1BAA in a Cadillac Hybrid/Electric Vehicle be prevented?

- Regular maintenance and inspection of the hybrid/electric system in the vehicle can help prevent issues like the code P1BAA. Following manufacturer recommendations and addressing any warning signs promptly can help prevent such codes from appearing.