AutoCodes – GMC – P1B75 GMC

P1B75 GMC Code - Hybrid/Electric Vehicle Battery 49 Circuit Performance

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: P1B75 GMC indicates Hybrid/Electric Vehicle Battery 49 Circuit Performance.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 710

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1B75 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 P1B75 GMC - Hybrid/Electric Vehicle Battery 49 Circuit Performance - AutoCodes.com — P1B75 GMC Code - Hybrid/Electric Vehicle Battery 49 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B75 GMC?

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

How to Fix the DTC P1B75 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 P1B75 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.

Need more information about the P1B75 GMC code?

Need more information on how to fix the P1B75 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B75 GMC code diagnosed by a professional: Find a repair shop in your area

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 P1B75 GMC Code

1. What are common symptoms of OBDII code P1B75 in a GMC hybrid/electric vehicle?

- Common symptoms include reduced hybrid battery performance, decreased fuel efficiency, and potential issues with vehicle starting or charging.

2. What can cause the OBDII code P1B75 to trigger in a GMC hybrid/electric vehicle?

- The code P1B75 is typically triggered by a fault in the Hybrid/Electric Vehicle Battery 49 circuit, which can be caused by wiring issues, faulty battery components, or problems with the battery management system.

3. How can I diagnose the OBDII code P1B75 in my GMC hybrid/electric vehicle?

- Diagnosis usually involves using a diagnostic scanner to retrieve the specific fault code, inspecting the hybrid battery components for visible damage, and testing the battery cells and connections for proper operation.

4. Is it safe to continue driving my GMC hybrid/electric vehicle with the OBDII code P1B75 present?

- It is not recommended to continue driving the vehicle with the P1B75 code present, as it can lead to further damage to the hybrid battery system and potentially cause safety hazards.

5. Can I reset the OBDII code P1B75 in my GMC hybrid/electric vehicle myself?

- While you can clear the code using a diagnostic scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

6. What are some repair tips for addressing OBDII code P1B75 in a GMC hybrid/electric vehicle?

- Repair tips may include checking and repairing any damaged wiring, replacing faulty battery components, recalibrating the battery management system, or seeking professional assistance from a certified technician.

7. How much does it typically cost to repair OBDII code P1B75 in a GMC hybrid/electric vehicle?

- The cost of repair can vary depending on the extent of the issue and the specific components that need to be replaced. It is recommended to obtain quotes from reputable repair shops for an accurate estimate.

8. Are there any preventive maintenance measures I can take to avoid OBDII code P1B75 in my GMC hybrid/electric vehicle?

- Regularly inspecting the hybrid battery system, following the manufacturer's maintenance schedule, and avoiding overcharging or discharging the battery can help prevent issues that may trigger the P1B75 code.

9. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P1B75 in a GMC hybrid/electric vehicle?

- While some basic troubleshooting and repairs may be possible for DIY enthusiasts, diagnosing and repairing complex hybrid/electric vehicle systems like the battery may require specialized tools and expertise best left to professionals.

10. How long does it typically take to repair OBDII code P1B75 in a GMC hybrid/electric vehicle?

- The repair time can vary depending on the specific issue causing the code and the availability of replacement parts. It is advisable to consult with a qualified technician for an accurate assessment of the repair timeline.