AutoCodes – Chevrolet – P1B7D Chevrolet

P1B7D Chevrolet Code - Hybrid/Electric Vehicle Battery 51 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: P1B7D Chevrolet indicates Hybrid/Electric Vehicle Battery 51 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 928

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 P1B7D 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 P1B7D Chevrolet - Hybrid/Electric Vehicle Battery 51 Circuit High Voltage - AutoCodes.com — P1B7D Chevrolet Code - Hybrid/Electric Vehicle Battery 51 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B7D Chevrolet?

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

How to Fix the DTC P1B7D 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 P1B7D 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 P1B7D Chevrolet Code

1. What are the common symptoms of OBDII code P1B7D in a Chevrolet hybrid/electric vehicle?

- Common symptoms include decreased fuel efficiency, reduced power output, and a possible "Service High Voltage Charging System" warning message.

2. What can cause the OBDII code P1B7D to trigger in a Chevrolet hybrid/electric vehicle?

- This code is typically triggered by a high voltage condition in the Hybrid/Electric Vehicle Battery 51 circuit, which may be caused by a faulty battery pack, damaged wiring, or a malfunctioning control module.

3. How serious is the OBDII code P1B7D in a Chevrolet hybrid/electric vehicle?

- This code indicates a high voltage issue in the vehicle's battery system, which can affect the vehicle's performance and safety. It is recommended to address this issue promptly to prevent further damage.

4. What are some possible repair tips for fixing OBDII code P1B7D in a Chevrolet hybrid/electric vehicle?

- Some repair tips include checking the battery pack connections, inspecting the wiring for any damage, and testing the control module for proper functioning. It is also advisable to consult a professional technician for a thorough diagnosis and repair.

5. Can I continue driving my Chevrolet hybrid/electric vehicle with the OBDII code P1B7D present?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further damage to the battery system and potentially compromise the vehicle's safety. It is best to have the issue diagnosed and repaired as soon as possible.

6. How much does it typically cost to repair OBDII code P1B7D in a Chevrolet hybrid/electric vehicle?

- The cost of repairing this code can vary depending on the specific cause of the issue and the extent of the damage. It is advisable to obtain a professional diagnosis to get an accurate estimate of the repair costs.

7. Is the OBDII code P1B7D in a Chevrolet hybrid/electric vehicle covered under warranty?

- Depending on the vehicle's warranty coverage and the specific circumstances of the issue, the repair for this code may be covered under warranty. It is recommended to check with the manufacturer or dealership for warranty information.

8. How can I prevent OBDII code P1B7D from recurring in my Chevrolet hybrid/electric vehicle?

- To prevent this code from recurring, it is essential to maintain regular maintenance of the vehicle's battery system, including ensuring proper connections, monitoring the battery's health, and addressing any warning signs promptly.

9. Are there any safety precautions to keep in mind when dealing with OBDII code P1B7D in a Chevrolet hybrid/electric vehicle?

- When dealing with high voltage systems like those in hybrid/electric vehicles, it is crucial to follow safety protocols provided by the manufacturer and consult a professional technician for repairs to ensure safety and prevent accidents.

10. Can I reset the OBDII code P1B7D in my Chevrolet hybrid/electric vehicle on my own?

- While you may be able to clear the code temporarily using an OBDII scanner, it is essential to address the underlying issue causing the code to prevent it from recurring. It is recommended to seek professional help for a comprehensive diagnosis and repair.