AutoCodes – Cadillac – P0BAC Cadillac

P0BAC Cadillac Code - Hybrid/Electric Vehicle Battery 23 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: P0BAC Cadillac indicates Hybrid/Electric Vehicle Battery 23 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 840

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0BAC 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 P0BAC Cadillac - Hybrid/Electric Vehicle Battery 23 Circuit High Voltage - AutoCodes.com — P0BAC Cadillac Code - Hybrid/Electric Vehicle Battery 23 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0BAC Cadillac?

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

How to Fix the DTC P0BAC 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 P0BAC 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.

Need more information about the P0BAC Cadillac code?

Need more information on how to fix the P0BAC Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0BAC Cadillac code diagnosed by a professional: Find a repair shop in your area

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 P0BAC Cadillac Code

1. What are the common symptoms of OBDII code P0BAC in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms may include decreased fuel efficiency, reduced power, warning lights on the dashboard, and potential issues with the hybrid/electric system.

2. What are some possible causes of the OBDII code P0BAC in a Cadillac Hybrid/Electric Vehicle?

- Causes may include a faulty high voltage battery, damaged wiring or connectors in the battery circuit, issues with the battery management system, or a malfunctioning hybrid control module.

3. How can I diagnose the OBDII code P0BAC in my Cadillac Hybrid/Electric Vehicle?

- Diagnosing this code typically involves using a professional OBDII scanner to read the specific fault codes, conducting a visual inspection of the high voltage battery system, and testing the battery and related components for proper function.

4. Can I continue driving my Cadillac Hybrid/Electric Vehicle with the OBDII code P0BAC present?

- It is not recommended to continue driving with this code present, as it can indicate potential issues with the high voltage battery system that may compromise the vehicle's performance and safety.

5. What are some repair tips for addressing the OBDII code P0BAC in a Cadillac Hybrid/Electric Vehicle?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing a faulty high voltage battery, resetting the system, and ensuring all components are functioning correctly.

6. How much does it typically cost to repair the OBDII code P0BAC in a Cadillac Hybrid/Electric Vehicle?

- Repair costs can vary depending on the specific issue causing the code, but they may range from a few hundred to a few thousand dollars, especially if the high voltage battery needs to be replaced.

7. Are there any safety precautions I should take when working on the high voltage system related to the OBDII code P0BAC in my Cadillac Hybrid/Electric Vehicle?

- Yes, it is crucial to follow proper safety procedures when working on the high voltage system, including wearing insulated gloves and using insulated tools to prevent the risk of electric shock.

8. Can the OBDII code P0BAC in a Cadillac Hybrid/Electric Vehicle be cleared/reset without fixing the underlying issue?

- While you can clear the code temporarily, it is not recommended to do so without addressing the root cause, as the issue may persist and potentially lead to more severe problems in the future.

9. Is it possible to prevent the OBDII code P0BAC from occurring in a Cadillac Hybrid/Electric Vehicle?

- Regular maintenance and timely inspections of the high voltage battery system can help prevent issues that may trigger the code. Following manufacturer recommendations for service intervals is also essential.

10. How long does it typically take to repair the OBDII code P0BAC in a Cadillac Hybrid/Electric Vehicle?

- The repair time can vary based on the specific problem causing the code and the expertise of the technician, but it may take anywhere from a few hours to a few days to complete the repair.