AutoCodes – Generic – P1B2B

P1B2B Code - Hybrid/Electric Vehicle Battery 30 Circuit

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: P1B2B indicates Hybrid/Electric Vehicle Battery 30 Circuit.
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 1,032

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 P1B2B 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 P1B2B - Hybrid/Electric Vehicle Battery 30 Circuit - AutoCodes.com — P1B2B Code - Hybrid/Electric Vehicle Battery 30 Circuit

What does this mean?

What are the Possible Causes of the DTC P1B2B?

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

How to Fix the DTC P1B2B?

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 P1B2B 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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Information for Specific Makes

P1B2B Buick — Hybrid/Electric Vehicle Battery 30 Circuit
P1B2B Cadillac — Hybrid/Electric Vehicle Battery 30 Circuit
P1B2B Chevrolet — Hybrid/Electric Vehicle Battery 30 Circuit
P1B2B GMC — Hybrid/Electric Vehicle Battery 30 Circuit
P1B2B Saturn — Hybrid/Electric Vehicle Battery 30 Circuit

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 P1B2B Code

1. What are common symptoms of OBDII code P1B2B related to the Hybrid/Electric Vehicle Battery 30 Circuit?

- Common symptoms include reduced hybrid/electric vehicle performance, decreased fuel efficiency, and potential inability to start the vehicle.

2. What are possible causes of OBDII code P1B2B indicating an issue with the Hybrid/Electric Vehicle Battery 30 Circuit?

- Potential causes include a faulty battery pack, damaged battery wiring or connectors, or issues with the battery control module.

3. How can I diagnose the Hybrid/Electric Vehicle Battery 30 Circuit issue triggering OBDII code P1B2B?

- Diagnosis typically involves using a specialized diagnostic scanner to read the code, testing the battery pack voltage, inspecting wiring for damage, and checking connections for tightness.

4. Is it safe to continue driving with OBDII code P1B2B related to the Hybrid/Electric Vehicle Battery 30 Circuit?

- It is not recommended to continue driving with this code as it can lead to further damage to the hybrid/electric system and potentially leave you stranded.

5. Can I repair OBDII code P1B2B at home, or do I need to take my vehicle to a professional mechanic?

- While basic inspections like checking battery connections can be done at home, diagnosing and repairing complex issues with the Hybrid/Electric Vehicle Battery 30 Circuit may require the expertise of a trained mechanic.

6. How much does it typically cost to repair OBDII code P1B2B indicating a problem with the Hybrid/Electric Vehicle Battery 30 Circuit?

- Repair costs can vary significantly depending on the specific issue causing the code, but they can range from a few hundred to over a thousand dollars for parts and labor.

7. Are there any maintenance tips to prevent OBDII code P1B2B from occurring in the future?

- Regularly inspecting and maintaining the hybrid/electric vehicle battery system, including keeping connections clean and secure, can help prevent issues leading to code P1B2B.

8. Can a weak or failing 12V auxiliary battery cause OBDII code P1B2B to trigger in a hybrid/electric vehicle?

- Yes, a weak or failing 12V auxiliary battery can sometimes cause issues with the hybrid/electric system, including triggering code P1B2B related to the Hybrid/Electric Vehicle Battery 30 Circuit.

9. Will resetting the OBDII code P1B2B related to the Hybrid/Electric Vehicle Battery 30 Circuit make the problem go away permanently?

- Simply resetting the code without addressing the underlying issue will not permanently fix the problem, as the code is likely to reappear until the root cause is resolved.

10. Can extreme weather conditions, such as very high or low temperatures, contribute to triggering OBDII code P1B2B in a hybrid/electric vehicle?

- Yes, extreme weather conditions can sometimes exacerbate existing issues with the hybrid/electric system, potentially leading to the triggering of code P1B2B related to the Hybrid/Electric Vehicle Battery 30 Circuit.