AutoCodes – Generic – P0BB1

P0BB1 Code - Hybrid/Electric Vehicle Battery 24 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: P0BB1 indicates Hybrid/Electric Vehicle Battery 24 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 1,522

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 P0BB1 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 P0BB1 - Hybrid/Electric Vehicle Battery 24 Circuit High Voltage - AutoCodes.com — P0BB1 Code - Hybrid/Electric Vehicle Battery 24 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0BB1?

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

How to Fix the DTC P0BB1?

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 P0BB1 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 P0BB1 code?

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Need Help with the Code?

Get the P0BB1 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0BB1 Buick — Hybrid/Electric Vehicle Battery 24 Circuit High Voltage
P0BB1 Cadillac — Hybrid/Electric Vehicle Battery 24 Circuit High Voltage
P0BB1 Chevrolet — Hybrid/Electric Vehicle Battery 24 Circuit High Voltage
P0BB1 GMC — Hybrid/Electric Vehicle Battery 24 Circuit High Voltage
P0BB1 Saturn — Hybrid/Electric Vehicle Battery 24 Circuit High Voltage

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 P0BB1 Code

1. What are the common symptoms of OBDII code P0BB1 (Hybrid/Electric Vehicle Battery 24 Circuit High Voltage)?

- Common symptoms include the illumination of the check engine light, reduced hybrid/electric vehicle performance, and potential issues with the battery system.

2. What typically causes OBDII code P0BB1 to trigger?

- This code is usually triggered by a high voltage condition detected in the 24th circuit of the hybrid/electric vehicle battery, which can result from wiring issues, faulty sensors, or problems within the battery pack.

3. How can I diagnose OBDII code P0BB1 related to high voltage in the hybrid/electric vehicle battery?

- Diagnosis involves checking the wiring harness for any damage, inspecting the battery system components, and using a multimeter to measure voltage levels in the 24th circuit.

4. What are some repair tips for addressing OBDII code P0BB1?

- Repairing this code may involve fixing any damaged wiring, replacing faulty sensors, inspecting and potentially repairing the battery pack, and clearing the code with an OBDII scanner after the repairs are completed.

5. Is it safe to continue driving with OBDII code P0BB1 present?

- It is not recommended to continue driving with this code active, as it may lead to further damage to the hybrid/electric vehicle battery system and affect the overall performance and safety of the vehicle.

6. Can OBDII code P0BB1 be reset without fixing the underlying issue?

- While the code can be cleared with an OBDII scanner, it is crucial to address the underlying high voltage issue in the battery system to prevent potential safety hazards and ensure proper vehicle operation.

7. Are there any precautions to take when working on the high voltage components related to OBDII code P0BB1?

- When working on high voltage components of hybrid/electric vehicles, it is essential to follow proper safety procedures, wear appropriate protective gear, and consider seeking assistance from a qualified technician or service center.

8. Does OBDII code P0BB1 affect the fuel efficiency of a hybrid/electric vehicle?

- Yes, this code can impact the fuel efficiency of the vehicle as it indicates a problem with the high voltage circuit, which can affect the overall performance and energy management of the hybrid/electric system.

9. How long does it typically take to repair OBDII code P0BB1 in a hybrid/electric vehicle?

- The repair time for this code can vary depending on the underlying issue, but it may take a few hours to a day to diagnose, address, and clear the code with the necessary repairs.

10. Is it possible to prevent OBDII code P0BB1 from occurring in the future?

- Regular maintenance, timely inspections of the battery system, and addressing any issues promptly can help prevent the occurrence of OBDII code P0BB1 related to high voltage in hybrid/electric vehicles.