AutoCodes – GMC – P0B7C GMC

P0B7C GMC Code - Hybrid/Electric Vehicle Battery 14 Circuit

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: P0B7C GMC indicates Hybrid/Electric Vehicle Battery 14 Circuit.
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 818

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B7C 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 P0B7C GMC - Hybrid/Electric Vehicle Battery 14 Circuit - AutoCodes.com — P0B7C GMC Code - Hybrid/Electric Vehicle Battery 14 Circuit

What does this mean?

What are the Possible Causes of the DTC P0B7C GMC?

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

How to Fix the DTC P0B7C 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 P0B7C 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 P0B7C GMC Code

1. What does the OBDII code P0B7C for GMC Hybrid/Electric Vehicle Battery 14 Circuit indicate?

This code indicates a problem with the 14th circuit of the hybrid/electric vehicle battery, affecting the vehicle's power and performance.

2. What are common symptoms of the P0B7C code in a GMC hybrid/electric vehicle?

Common symptoms include reduced power, decreased fuel efficiency, difficulty starting the vehicle, and potential issues with battery charging.

3. What are possible causes of the P0B7C code in a GMC hybrid/electric vehicle?

Possible causes can include a faulty battery pack, damaged wiring or connectors in the 14th circuit, issues with the battery management system, or a malfunctioning battery sensor.

4. How can I diagnose the P0B7C code in my GMC hybrid/electric vehicle?

Diagnosis typically involves using a scan tool to read the code, checking the 14th circuit for any visible damage, inspecting wiring and connectors, and testing the battery pack and related components.

5. Can I drive my GMC hybrid/electric vehicle with the P0B7C code?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the battery system and potentially compromise safety and performance.

6. How can I repair the P0B7C code in my GMC hybrid/electric vehicle?

Repair options may include replacing damaged wiring or connectors, repairing the battery pack, resetting the battery management system, or seeking professional assistance from a certified technician.

7. Are there any preventative maintenance tips to avoid the P0B7C code in my GMC hybrid/electric vehicle?

Regularly inspecting the battery system, keeping up with scheduled maintenance, avoiding overcharging or discharging the battery, and addressing any warning signs promptly can help prevent this code from appearing.

8. Is the repair for the P0B7C code in a GMC hybrid/electric vehicle typically expensive?

The cost of repair can vary depending on the specific issue causing the code, the extent of the damage, and whether any components need to be replaced. It's advisable to obtain a diagnostic and repair estimate from a qualified technician.

9. Can the P0B7C code be a recurring issue in GMC hybrid/electric vehicles?

If the underlying cause of the code is not properly addressed or if there are ongoing battery system issues, the P0B7C code may recur. Thorough diagnosis and repair are essential to prevent reoccurrence.

10. Is it safe to attempt DIY repairs for the P0B7C code in a GMC hybrid/electric vehicle?

Due to the complexity of hybrid/electric vehicle systems and the potential safety risks involved, it is recommended to seek professional assistance or guidance from a certified technician when dealing with the P0B7C code.