AutoCodes – Cadillac – P0BA1 Cadillac

P0BA1 Cadillac Code - Hybrid/Electric Vehicle Battery 21 Circuit Low 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: P0BA1 Cadillac indicates Hybrid/Electric Vehicle Battery 21 Circuit Low 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 892

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
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Code P0BA1 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 P0BA1 Cadillac - Hybrid/Electric Vehicle Battery 21 Circuit Low Voltage - AutoCodes.com — P0BA1 Cadillac Code - Hybrid/Electric Vehicle Battery 21 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0BA1 Cadillac?

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

How to Fix the DTC P0BA1 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 P0BA1 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 P0BA1 Cadillac Code

1. What are common symptoms of OBDII code P0BA1 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include issues with battery performance, reduced electric driving range, warning lights on the dashboard, and potential difficulty starting the vehicle.

2. What can cause the OBDII code P0BA1 in a Cadillac Hybrid/Electric Vehicle?

- The code P0BA1 typically indicates a problem with the 21st circuit of the hybrid/electric vehicle battery, often caused by low voltage in the circuit.

3. How serious is the OBDII code P0BA1 in a Cadillac Hybrid/Electric Vehicle?

- The code P0BA1 should be addressed promptly to prevent further damage to the hybrid/electric vehicle battery and ensure the vehicle operates efficiently.

4. How can I diagnose the OBDII code P0BA1 in my Cadillac Hybrid/Electric Vehicle?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault codes, inspecting the battery system, checking voltage levels, and testing the 21st circuit for abnormalities.

5. Can I still drive my Cadillac with the OBDII code P0BA1 present?

- It is not recommended to drive the vehicle with the code P0BA1 present, as it indicates a potential issue with the hybrid/electric vehicle battery that can affect the vehicle's performance and safety.

6. What are some repair tips for fixing the OBDII code P0BA1 in a Cadillac Hybrid/Electric Vehicle?

- Repair tips may include checking and repairing faulty wiring, replacing damaged components in the 21st circuit, ensuring proper voltage levels, and resetting the fault codes after repairs are made.

7. How much does it typically cost to repair the OBDII code P0BA1 in a Cadillac Hybrid/Electric Vehicle?

- The cost of repairs for the OBDII code P0BA1 can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It is recommended to consult with a professional mechanic for an accurate estimate.

8. Can I reset the OBDII code P0BA1 in my Cadillac Hybrid/Electric Vehicle myself?

- While you can attempt to clear the fault code using a diagnostic scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

9. How often does the OBDII code P0BA1 occur in Cadillac Hybrid/Electric Vehicles?

- The OBDII code P0BA1 related to the 21st circuit low voltage in the hybrid/electric vehicle battery may occur occasionally in Cadillac models with such systems, especially as the vehicle ages.

10. Is it safe to continue using the hybrid/electric functions of my Cadillac with the OBDII code P0BA1 present?

- It is not recommended to use the hybrid/electric functions of the vehicle with the OBDII code P0BA1 present, as it indicates a potential issue with the battery system that can impact overall vehicle safety and performance.