AutoCodes – Cadillac – P0BBB Cadillac

P0BBB Cadillac Code - Hybrid/Electric Vehicle Battery 26 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: P0BBB Cadillac indicates Hybrid/Electric Vehicle Battery 26 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 1,168

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 P0BBB 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 P0BBB Cadillac - Hybrid/Electric Vehicle Battery 26 Circuit High Voltage - AutoCodes.com — P0BBB Cadillac Code - Hybrid/Electric Vehicle Battery 26 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0BBB Cadillac?

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

How to Fix the DTC P0BBB 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 P0BBB 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 P0BBB Cadillac Code

1. What are common symptoms of OBDII code P0BBB in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced vehicle performance, decreased fuel efficiency, and potential check engine light illumination.

2. What does the OBDII code P0BBB for Hybrid/Electric Vehicle Battery 26 Circuit High Voltage indicate?

- This code indicates a high voltage condition in the Hybrid/Electric Vehicle Battery 26 Circuit.

3. What are some possible causes of OBDII code P0BBB in a Cadillac Hybrid/Electric Vehicle?

- Possible causes include a faulty battery management system, issues with the high voltage circuit, or a malfunctioning battery pack.

4. How can I diagnose the OBDII code P0BBB in my Cadillac Hybrid/Electric Vehicle?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code and then performing further testing on the battery system components.

5. Is it safe to drive with OBDII code P0BBB present in my Cadillac Hybrid/Electric Vehicle?

- It is not recommended to drive with this code present, as it can lead to further damage to the battery system or other components.

6. Can I repair OBDII code P0BBB in my Cadillac Hybrid/Electric Vehicle myself?

- Due to the complexity of the hybrid/electric vehicle battery system, it is recommended to have this code diagnosed and repaired by a qualified technician.

7. How much does it typically cost to repair OBDII code P0BBB in a Cadillac Hybrid/Electric Vehicle?

- Repair costs can vary depending on the specific issue causing the code, but it may involve replacing components in the battery system, which can be expensive.

8. Are there any maintenance tips to prevent OBDII code P0BBB from occurring in my Cadillac Hybrid/Electric Vehicle?

- Regular inspection and maintenance of the hybrid/electric vehicle battery system can help prevent issues leading to this code, such as checking for loose connections or damaged wiring.

9. Can OBDII code P0BBB in a Cadillac Hybrid/Electric Vehicle be cleared/reset without addressing the underlying issue?

- Clearing the code without addressing the underlying issue will only temporarily turn off the check engine light, but the problem will likely reoccur.

10. How long does it typically take to repair OBDII code P0BBB in a Cadillac Hybrid/Electric Vehicle?

- The repair time can vary depending on the exact cause of the code and the availability of parts, but it may take several hours to a full day to diagnose and repair the issue.