AutoCodes – GMC – P1BC7 GMC

P1BC7 GMC Code - Hybrid/Electric Vehicle Battery 76 Circuit Low 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: P1BC7 GMC indicates Hybrid/Electric Vehicle Battery 76 Circuit Low 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 784

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 P1BC7 GMC 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 P1BC7 GMC - Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage - AutoCodes.com — P1BC7 GMC Code - Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1BC7 GMC?

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

How to Fix the DTC P1BC7 GMC?

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 P1BC7 GMC 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 P1BC7 GMC Code

1. What are the common symptoms of OBDII code P1BC7 GMC (Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage)?

- Common symptoms include reduced electric vehicle range, poor battery performance, and potential warning lights on the dashboard.

2. What can cause the OBDII code P1BC7 GMC to trigger?

- This code is typically triggered by issues such as a weak or failing hybrid/electric vehicle battery, faulty battery management system, or electrical wiring problems.

3. How can I diagnose the root cause of OBDII code P1BC7 GMC?

- Diagnosis involves performing a thorough inspection of the hybrid/electric vehicle battery, checking the battery management system for faults, and testing the electrical connections for proper voltage.

4. Is it safe to continue driving with OBDII code P1BC7 GMC active?

- It is not recommended to continue driving with this code active, as it can lead to further damage to the hybrid/electric vehicle battery and potentially affect the vehicle's overall performance.

5. Can I reset the OBDII code P1BC7 GMC without addressing the underlying issue?

- Resetting the code without addressing the underlying issue will likely result in the code reappearing once the system detects the same problem again.

6. What are some repair tips for addressing OBDII code P1BC7 GMC?

- Repair tips may include replacing the hybrid/electric vehicle battery if necessary, repairing any damaged wiring, recalibrating the battery management system, or updating software as recommended by the manufacturer.

7. How much does it typically cost to repair OBDII code P1BC7 GMC?

- Repair costs can vary depending on the extent of the issue, but they may range from a few hundred to a few thousand dollars, especially if the hybrid/electric vehicle battery needs replacement.

8. Can a DIY enthusiast fix OBDII code P1BC7 GMC at home?

- While some basic inspections and checks can be done at home, diagnosing and repairing this code often requires specialized tools and expertise, making it a job best suited for professional technicians.

9. Are there any preventive measures to avoid OBDII code P1BC7 GMC in the future?

- Regular maintenance of the hybrid/electric vehicle battery, following manufacturer recommendations, and addressing any electrical issues promptly can help prevent the recurrence of this code.

10. How long does it take to repair OBDII code P1BC7 GMC?

- The repair time can vary depending on the exact cause of the issue, but it may take several hours to a day or more to diagnose and fix the problem correctly.