AutoCodes – Chevrolet – P1B43 Chevrolet

P1B43 Chevrolet 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 Chevrolet 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.

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Code Popularity 1,130

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

Faulty Hybrid/Electric Vehicle Battery Pack

How to Fix the DTC P1B43 Chevrolet?

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 Chevrolet 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 P1B43 Chevrolet Code

1. What are common symptoms of OBDII code P1B43 in a Chevrolet related to Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage?

- Common symptoms include decreased hybrid system performance, reduced fuel efficiency, and possible illumination of the check engine light.

2. What are some possible causes of OBDII code P1B43 in a Chevrolet?

- Possible causes include a faulty Drive Motor 2 Control Module, issues with the Hybrid/EV Battery Voltage Isolation Sensing Circuit 2, or wiring/connectivity problems.

3. How can I diagnose the cause of OBDII code P1B43 in my Chevrolet?

- Proper diagnosis typically involves using a diagnostic scanner to read the code, checking the Drive Motor 2 Control Module and related components for faults, and inspecting the wiring for any damage or loose connections.

4. Can I drive my Chevrolet with OBDII code P1B43 present?

- It is not recommended to drive your vehicle with this code present, as it can affect the hybrid system's performance and potentially lead to further damage.

5. How can I repair OBDII code P1B43 in my Chevrolet?

- Repair options may include replacing the Drive Motor 2 Control Module, repairing or replacing the Hybrid/EV Battery Voltage Isolation Sensing Circuit 2, and addressing any wiring issues as necessary.

6. Does OBDII code P1B43 in a Chevrolet require professional assistance for repair?

- Due to the complexity of hybrid and EV systems, it is recommended to seek professional assistance for diagnosing and repairing OBDII code P1B43 in a Chevrolet to ensure proper resolution.

7. Are there any preventive maintenance steps to avoid OBDII code P1B43 in a Chevrolet?

- Regular maintenance of the hybrid system, including keeping the components clean and ensuring proper electrical connections, can help prevent issues that may trigger OBDII code P1B43.

8. Can a DIY enthusiast attempt to troubleshoot OBDII code P1B43 in a Chevrolet?

- While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing OBDII code P1B43 related to hybrid systems may require specialized knowledge and tools best handled by professionals.

9. Is OBDII code P1B43 specific to certain Chevrolet models?

- OBDII code P1B43 related to Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage is specific to certain Chevrolet hybrid or electric vehicles with this particular system configuration.

10. Can resetting the OBD system clear OBDII code P1B43 in a Chevrolet?

- Resetting the OBD system may temporarily clear the code, but it is important to address the underlying issue causing OBDII code P1B43 in a Chevrolet to prevent it from recurring.