AutoCodes – Generic – P1B1B

P1B1B Code - Hybrid/Electric Vehicle Battery 28 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: P1B1B indicates Hybrid/Electric Vehicle Battery 28 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 2,474

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 P1B1B 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 P1B1B - Hybrid/Electric Vehicle Battery 28 Circuit High Voltage - AutoCodes.com — P1B1B Code - Hybrid/Electric Vehicle Battery 28 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B1B?

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

How to Fix the DTC P1B1B?

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 P1B1B 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 P1B1B code?

Need more information on how to fix the P1B1B code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B1B code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1B1B Buick — Hybrid/Electric Vehicle Battery 28 Circuit High Voltage
P1B1B Cadillac — Hybrid/Electric Vehicle Battery 28 Circuit High Voltage
P1B1B Chevrolet — Hybrid/Electric Vehicle Battery 28 Circuit High Voltage
P1B1B GMC — Hybrid/Electric Vehicle Battery 28 Circuit High Voltage
P1B1B Saturn — Hybrid/Electric Vehicle Battery 28 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 P1B1B Code

1. What are the common symptoms of OBDII code P1B1B related to the Hybrid/Electric Vehicle Battery 28 Circuit High Voltage?

- Common symptoms include illuminated check engine light, reduced hybrid/electric vehicle performance, and potential powertrain issues.

2. What are the possible causes of OBDII code P1B1B indicating Hybrid/Electric Vehicle Battery 28 Circuit High Voltage?

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

3. How serious is OBDII code P1B1B for a Hybrid/Electric Vehicle Battery 28 Circuit High Voltage?

- This code should be addressed promptly as it can affect the performance and safety of the hybrid/electric vehicle. It is recommended to have the vehicle diagnosed and repaired by a qualified technician.

4. Can I continue driving my vehicle with OBDII code P1B1B present for Hybrid/Electric Vehicle Battery 28 Circuit High Voltage?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the high voltage battery system and potentially unsafe driving conditions.

5. How can I diagnose and repair OBDII code P1B1B related to Hybrid/Electric Vehicle Battery 28 Circuit High Voltage?

- Diagnosis typically involves using a scan tool to pinpoint the exact location of the issue within the high voltage battery circuit. Repair may involve replacing damaged components, repairing wiring, or recalibrating the battery management system.

6. Are there any safety precautions to consider when dealing with OBDII code P1B1B and Hybrid/Electric Vehicle Battery 28 Circuit High Voltage?

- Yes, it is important to follow proper safety procedures when working on high voltage systems. It is recommended to consult the vehicle's service manual or seek assistance from a professional technician.

7. Can a DIY enthusiast fix OBDII code P1B1B associated with Hybrid/Electric Vehicle Battery 28 Circuit High Voltage?

- Due to the complexity and safety concerns associated with high voltage systems, it is best to have this code diagnosed and repaired by a qualified technician with experience in hybrid/electric vehicles.

8. How much does it typically cost to repair OBDII code P1B1B for Hybrid/Electric Vehicle Battery 28 Circuit High Voltage?

- Repair costs can vary depending on the specific issue causing the code, the make and model of the vehicle, and labor rates. It is advisable to get a diagnostic assessment from a professional to determine the exact cost.

9. Will resetting the OBDII code P1B1B related to Hybrid/Electric Vehicle Battery 28 Circuit High Voltage make it go away permanently?

- Simply resetting the code may temporarily turn off the check engine light, but the underlying issue causing the code will still need to be diagnosed and repaired to prevent it from reoccurring.

10. What steps can I take to prevent OBDII code P1B1B for Hybrid/Electric Vehicle Battery 28 Circuit High Voltage from happening in the future?

- Regular maintenance of the high voltage battery system, such as checking for loose connections, monitoring battery health, and following manufacturer guidelines, can help prevent this code from appearing.