AutoCodes – GMC – P0B75 GMC

P0B75 GMC Code - Hybrid/Electric Vehicle Battery 12 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: P0B75 GMC indicates Hybrid/Electric Vehicle Battery 12 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 832

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 P0B75 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 P0B75 GMC - Hybrid/Electric Vehicle Battery 12 Circuit High Voltage - AutoCodes.com — P0B75 GMC Code - Hybrid/Electric Vehicle Battery 12 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0B75 GMC?

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

How to Fix the DTC P0B75 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 P0B75 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 P0B75 GMC Code

1. What are common symptoms of OBDII code P0B75 in a GMC hybrid/electric vehicle?

- Common symptoms include a check engine light, reduced hybrid system performance, and potential issues with the high voltage battery system.

2. What does the OBDII code P0B75 in a GMC hybrid/electric vehicle indicate?

- This code indicates a fault with the Hybrid/Electric Vehicle Battery 12 Circuit High Voltage, signaling a potential problem with the high voltage circuitry.

3. What are possible causes of OBDII code P0B75 in a GMC hybrid/electric vehicle?

- Possible causes include a damaged high voltage battery pack, faulty wiring connections, issues with the battery management system, or a malfunctioning high voltage relay.

4. How can I diagnose the OBDII code P0B75 in my GMC hybrid/electric vehicle?

- Diagnosis typically involves using a scan tool to retrieve the specific code, checking the high voltage battery connections, inspecting the battery pack for physical damage, and testing the high voltage circuit components.

5. Can I continue driving my GMC hybrid/electric vehicle with OBDII code P0B75 present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the high voltage battery system and potentially unsafe driving conditions.

6. How should I repair OBDII code P0B75 in my GMC hybrid/electric vehicle?

- Repair methods may include replacing the high voltage battery pack, repairing damaged wiring connections, resetting the battery management system, or replacing faulty components identified during diagnosis.

7. Are there any safety precautions to keep in mind when dealing with OBDII code P0B75 in a GMC hybrid/electric vehicle?

- Safety precautions include ensuring the high voltage system is properly powered down before attempting any repairs, wearing appropriate personal protective equipment, and following manufacturer guidelines for handling high voltage components.

8. Can an OBDII scanner reset the OBDII code P0B75 in a GMC hybrid/electric vehicle?

- While an OBDII scanner can clear the fault code, it is important to diagnose and address the underlying issue causing the code to prevent it from reoccurring.

9. How often does OBDII code P0B75 occur in GMC hybrid/electric vehicles?

- The occurrence of this specific code can vary depending on the vehicle's age, usage, and maintenance history, but it is not uncommon in hybrid/electric vehicles with high voltage battery systems.

10. Is it possible to prevent OBDII code P0B75 from appearing in a GMC hybrid/electric vehicle?

- Regular maintenance, timely inspections of the high voltage battery system, and addressing any warning signs promptly can help prevent the occurrence of OBDII code P0B75 in a GMC hybrid/electric vehicle.