AutoCodes – Chevrolet – P1B7B Chevrolet

P1B7B Chevrolet 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 Chevrolet 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.

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Code Popularity 742

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

What does this mean?

What are the Possible Causes of the DTC P1B7B Chevrolet?

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

How to Fix the DTC P1B7B Chevrolet?

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 Chevrolet 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 P1B7B Chevrolet Code

1. What are common symptoms of OBDII code P1B7B in a Chevrolet hybrid/electric vehicle?

- Common symptoms include reduced battery performance, poor fuel efficiency, and potential issues with the vehicle's powertrain.

2. What can cause the OBDII code P1B7B to appear in a Chevrolet hybrid/electric vehicle?

- The code P1B7B typically indicates a problem with the Hybrid/Electric Vehicle Battery 51 Circuit, which could be caused by a faulty battery cell, wiring issues, or a malfunctioning battery management system.

3. How serious is the OBDII code P1B7B in a Chevrolet hybrid/electric vehicle?

- The code P1B7B is a serious issue in a hybrid/electric vehicle as it directly affects the performance and efficiency of the vehicle's battery system, potentially leading to further damage if not addressed promptly.

4. Can I continue driving my Chevrolet hybrid/electric vehicle with the OBDII code P1B7B present?

- It is not recommended to continue driving the vehicle with the code P1B7B present, as it can lead to further damage to the battery system and compromise the overall performance of the vehicle.

5. What are some DIY repair tips for addressing the OBDII code P1B7B in a Chevrolet hybrid/electric vehicle?

- DIY repair tips may include checking the battery connections, inspecting the wiring harness for any damage, and ensuring the battery management system is functioning correctly. However, it is advisable to seek professional help for proper diagnosis and repair.

6. How much does it typically cost to repair the OBDII code P1B7B in a Chevrolet hybrid/electric vehicle?

- The cost of repairing the OBDII code P1B7B can vary depending on the exact cause of the issue. It may involve replacing a faulty battery cell, repairing wiring, or recalibrating the battery management system, with costs ranging from a few hundred to a few thousand dollars.

7. Can resetting the OBDII code P1B7B in a Chevrolet hybrid/electric vehicle fix the issue permanently?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the code to appear. It is crucial to diagnose and address the root cause to prevent future occurrences.

8. Are there any recalls or technical service bulletins related to the OBDII code P1B7B in Chevrolet hybrid/electric vehicles?

- It is recommended to check with Chevrolet dealerships or online databases for any recalls or technical service bulletins related to the OBDII code P1B7B in specific models of Chevrolet hybrid/electric vehicles.

9. How can regular maintenance help prevent the OBDII code P1B7B from appearing in a Chevrolet hybrid/electric vehicle?

- Regular maintenance, such as checking the battery health, inspecting the wiring, and keeping the battery management system updated, can help prevent issues that may trigger the OBDII code P1B7B in a Chevrolet hybrid/electric vehicle.

10. Is it safe to attempt to clear the OBDII code P1B7B using an OBDII scanner without addressing the underlying issue?

- While clearing the code with an OBDII scanner may temporarily turn off the warning light, it is not safe to ignore the underlying problem. It is essential to diagnose and repair the issue to ensure the vehicle's safety and performance.