AutoCodes – Generic – P1BC7

P1BC7 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 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 1,685

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

What does this mean?

What are the Possible Causes of the DTC P1BC7?

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

How to Fix the DTC P1BC7?

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 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 P1BC7 code?

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Need Help with the Code?

Get the P1BC7 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BC7 Buick — Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage
P1BC7 Cadillac — Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage
P1BC7 Chevrolet — Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage
P1BC7 GMC — Hybrid/Electric Vehicle Battery 76 Circuit Low Voltage
P1BC7 Saturn — Hybrid/Electric Vehicle Battery 76 Circuit Low 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 P1BC7 Code

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

- Common symptoms include poor battery performance, reduced driving range, and difficulty starting the vehicle.

2. What are possible causes of OBDII code P1BC7?

- Possible causes include a faulty battery pack, damaged battery cells, issues with the battery management system, or electrical system malfunctions.

3. How can I diagnose the underlying issue causing code P1BC7?

- Diagnosing the issue may require specialized diagnostic tools to assess the battery pack's voltage levels, test individual battery cells, and check the battery management system for faults.

4. Can driving with OBDII code P1BC7 cause further damage to the vehicle?

- Continuing to drive with this code may lead to accelerated battery degradation, reduced vehicle performance, and potential safety risks. It is recommended to address the issue promptly.

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

- Repair tips may include replacing damaged battery cells, repairing the battery management system, ensuring proper electrical connections, and performing a battery pack reset if applicable.

6. Is it safe to attempt DIY repairs for OBDII code P1BC7?

- Due to the complexity and high voltage nature of hybrid/electric vehicle batteries, it is recommended to seek professional assistance or specialized hybrid/electric vehicle repair services for safe and proper repairs.

7. How can regular maintenance help prevent OBDII code P1BC7 from occurring?

- Regular maintenance, such as monitoring battery health, following manufacturer recommendations for battery care, and addressing any electrical issues promptly, can help prevent code P1BC7.

8. Can extreme weather conditions affect OBDII code P1BC7?

- Extreme temperatures, both hot and cold, can impact hybrid/electric vehicle battery performance and potentially trigger code P1BC7. Storing the vehicle in moderate conditions can help mitigate this risk.

9. Are there any recalls or service bulletins related to OBDII code P1BC7?

- It is recommended to check with the vehicle manufacturer or authorized dealerships for any recalls or service bulletins related to code P1BC7 to address potential known issues.

10. How important is it to address OBDII code P1BC7 promptly?

- Promptly addressing code P1BC7 is crucial to prevent further damage to the battery system, ensure vehicle safety, maintain optimal performance, and avoid potential costly repairs in the future.