AutoCodes – GMC – P0B7E GMC

P0B7E GMC Code - Hybrid/Electric Vehicle Battery 14 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: P0B7E GMC indicates Hybrid/Electric Vehicle Battery 14 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 867

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 P0B7E 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 P0B7E GMC - Hybrid/Electric Vehicle Battery 14 Circuit Low Voltage - AutoCodes.com — P0B7E GMC Code - Hybrid/Electric Vehicle Battery 14 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0B7E GMC?

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

How to Fix the DTC P0B7E 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 P0B7E 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 P0B7E GMC Code

1. What are common symptoms of OBDII code P0B7E GMC (Hybrid/Electric Vehicle Battery 14 Circuit Low Voltage)?

- Common symptoms include poor vehicle performance, reduced fuel efficiency, and potential issues with the hybrid/electric system.

2. What can cause the OBDII code P0B7E GMC to appear?

- The code can be triggered by issues such as a faulty hybrid/electric vehicle battery, damaged wiring, or a malfunctioning battery control module.

3. How serious is the OBDII code P0B7E GMC?

- This code should be addressed promptly as it can negatively impact the performance and efficiency of the hybrid/electric vehicle.

4. How can I diagnose the underlying issue causing the OBDII code P0B7E GMC?

- Proper diagnostics using a scan tool capable of reading hybrid/electric vehicle codes is recommended to pinpoint the exact cause of the code.

5. Can I continue driving with the OBDII code P0B7E GMC present?

- It is not advisable to continue driving with this code active, as it can lead to further damage to the hybrid/electric system and compromise vehicle safety.

6. What are some repair tips for addressing OBDII code P0B7E GMC?

- Repair tips may include checking the battery connections, inspecting the wiring for damage, and consulting a professional for advanced diagnostics.

7. Is it safe to attempt DIY repairs for OBDII code P0B7E GMC?

- While basic checks like inspecting connections can be done, more complex repairs related to the hybrid/electric system should be handled by a qualified technician.

8. How much does it typically cost to repair OBDII code P0B7E GMC?

- The cost of repair can vary depending on the specific issue causing the code, so it's best to consult a mechanic for an accurate estimate.

9. Can a low voltage issue related to the hybrid/electric vehicle battery cause other problems in the vehicle?

- Yes, a low voltage issue can potentially cause other electrical components to malfunction and may lead to further complications if left unaddressed.

10. Are there any preventive measures to avoid encountering OBDII code P0B7E GMC in the future?

- Regular maintenance of the hybrid/electric system, including checking the battery health and ensuring proper connections, can help prevent issues that trigger this code.