AutoCodes – GMC – P1B43 GMC

P1B43 GMC Code - Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage

Quick Answer

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid/EV powertrain control module 1. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack. 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: P1B43 GMC indicates Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage.
Common causes: Common causes include Faulty Hybrid/Electric Vehicle Battery Pack.
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 885

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 P1B43 GMC Description

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid/EV powertrain control module 1. Two of the motor control modules operate their respective drive motor based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump. The motor control modules and the hybrid/EV powertrain control module 1 are part of the power inverter module and are not serviced separately.
The motor control modules test for isolation between each high voltage bus and vehicle chassis whenever high voltage is present at the power inverter module.

OBDII Code P1B43 GMC - Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage - AutoCodes.com — P1B43 GMC Code - Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B43 GMC?

Faulty Hybrid/Electric Vehicle Battery Pack

How to Fix the DTC P1B43 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 P1B43 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 P1B43 GMC code?

Need more information on how to fix the P1B43 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B43 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 P1B43 GMC Code

1. What are common symptoms of OBDII code P1B43 GMC?

- Common symptoms may include reduced hybrid/EV battery performance, illuminated warning lights on the dashboard, and potential difficulty starting the vehicle.

2. What does the OBDII code P1B43 GMC indicate?

- This code indicates a low voltage condition in Drive Motor 2 Control Module's Hybrid/EV Battery Voltage Isolation Sensing Circuit 2.

3. What are possible causes of OBDII code P1B43 GMC?

- Possible causes may include a faulty Drive Motor 2 Control Module, issues with the hybrid/EV battery pack, damaged wiring or connectors, or a malfunctioning voltage sensor.

4. How can I diagnose the cause of OBDII code P1B43 GMC?

- Diagnosis typically involves using a diagnostic scanner to read the code, checking the voltage levels in the relevant circuits, inspecting wiring and connectors for damage, and testing the Drive Motor 2 Control Module and associated components.

5. Can OBDII code P1B43 GMC be cleared/reset without fixing the underlying issue?

- While the code can be cleared/reset using a diagnostic scanner, it is not recommended to do so without addressing the root cause, as the issue may persist and potentially worsen over time.

6. Is it safe to continue driving with OBDII code P1B43 GMC present?

- It is not recommended to continue driving with this code present, as it can affect the performance and reliability of the hybrid/EV system. It is best to address the issue promptly.

7. How can I repair OBDII code P1B43 GMC?

- Repair options may include replacing the Drive Motor 2 Control Module, repairing or replacing damaged wiring/connectors, troubleshooting the hybrid/EV battery system, and ensuring proper voltage sensing circuit operation.

8. Can a DIY enthusiast fix OBDII code P1B43 GMC at home?

- Depending on the level of expertise and access to tools, some DIY enthusiasts may be able to diagnose and repair this code at home. However, complex hybrid/EV systems may require professional assistance.

9. How much does it cost to repair OBDII code P1B43 GMC?

- Repair costs can vary depending on the specific cause of the code, parts needed for replacement, and labor charges. It is recommended to obtain quotes from reputable automotive repair shops.

10. Are there any preventive measures to avoid OBDII code P1B43 GMC in the future?

- Regular maintenance of the hybrid/EV system, checking the battery pack health, and addressing any warning signs promptly can help prevent issues that may trigger OBDII code P1B43 GMC.