AutoCodes – Buick – P1B7B Buick

P1B7B Buick Code - Hybrid/Electric Vehicle Battery 51 Circuit Performance

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: P1B7B Buick indicates Hybrid/Electric Vehicle Battery 51 Circuit Performance.
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 894

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1B7B Buick 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 P1B7B Buick - Hybrid/Electric Vehicle Battery 51 Circuit Performance - AutoCodes.com — P1B7B Buick Code - Hybrid/Electric Vehicle Battery 51 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B7B Buick?

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

How to Fix the DTC P1B7B Buick?

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 P1B7B Buick 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 P1B7B Buick code?

Need more information on how to fix the P1B7B Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B7B Buick code diagnosed by a professional: Find a repair shop in your area

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 P1B7B Buick Code

1. What are common symptoms of OBDII code P1B7B Buick related to Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- Common symptoms include poor hybrid system performance, reduced fuel efficiency, and possible illumination of the check engine light.

2. What could be causing the OBDII code P1B7B Buick related to Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- Possible causes include issues with the hybrid battery pack, malfunctioning battery monitoring system components, or wiring faults in the battery circuit.

3. How can I diagnose the OBDII code P1B7B Buick related to Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- Diagnosis typically involves using a scan tool to retrieve the code, checking the hybrid battery voltage levels, inspecting wiring for damage, and testing relevant components for proper functioning.

4. What are some repair tips for addressing OBDII code P1B7B Buick related to Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- Repair tips may include resetting the code and monitoring for its return, testing and replacing faulty components, ensuring proper battery connections, and checking for any software updates from the manufacturer.

5. Can I continue driving my vehicle with the OBDII code P1B7B Buick related to Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- It is recommended to address the issue promptly to prevent further damage to the hybrid system. Continued driving with this code unresolved may lead to more severe problems.

6. Is it safe to attempt DIY repairs for the OBDII code P1B7B Buick related to Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- While some basic checks like inspecting wiring and connections can be done by DIY enthusiasts, complex repairs involving the hybrid system should be handled by experienced professionals due to the high voltage nature of the components.

7. How much does it typically cost to repair OBDII code P1B7B Buick related to Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- The cost of repair can vary depending on the exact cause of the issue, the need for component replacement, and labor charges. It's advisable to obtain quotes from reputable mechanics or dealerships.

8. Can extreme weather conditions affect the occurrence of OBDII code P1B7B Buick related to Hybrid/Electric Vehicle Battery 51 Circuit Performance?

- Yes, extreme temperatures can impact the performance of hybrid and electric vehicle batteries, potentially leading to issues that trigger this diagnostic trouble code.