AutoCodes – Generic – P1B41

P1B41 Code - Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance

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: P1B41 indicates Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance.
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 2,808

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 P1B41 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 P1B41 - Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance - AutoCodes.com — P1B41 Code - Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance

What does this mean?

What are the Possible Causes of the DTC P1B41?

Faulty Hybrid/Electric Vehicle Battery Pack

How to Fix the DTC P1B41?

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 P1B41 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 P1B41 code?

Need more information on how to fix the P1B41 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B41 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1B41 Buick — Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance
P1B41 Cadillac — Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance
P1B41 Chevrolet — Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance
P1B41 GMC — Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance
P1B41 Saturn — Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance

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 P1B41 Code

What does the OBDII code P1B41 mean?

The OBDII code P1B41 indicates a problem with the hybrid or electric vehicle's Drive Motor 1 Control Module related to the performance of the battery voltage isolation sensing.

What are the common symptoms associated with code P1B41?

Common symptoms include warning lights on the dashboard, reduced engine power, or the vehicle may enter limp mode, limiting performance to protect the system.

What could cause the P1B41 code to trigger?

Causes may include faulty battery isolation monitoring circuits, damaged wiring or connectors, a malfunctioning Drive Motor Control Module, or issues with the hybrid/EV battery itself.

How can I diagnose the P1B41 code?

Start by checking the battery isolation monitoring system for faults, inspecting wiring and connectors for damage, and using a scan tool to read live data from the Drive Motor Control Module.

What repairs are needed for code P1B41?

Repairs may involve fixing or replacing damaged wiring, connectors, or the Drive Motor Control Module, and ensuring proper battery isolation is maintained.

Can I drive my vehicle if the P1B41 code is present?

It is not recommended to drive the vehicle with this code, as it may lead to reduced performance or further damage to the hybrid/EV system.

How can I reset the P1B41 code after repairs?

After addressing the underlying issue, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a brief period.

Is it safe to repair the P1B41 code myself?

If you have experience with hybrid or EV systems and proper tools, you may attempt repairs. However, due to the high voltage involved, it is advisable to consult a professional mechanic.

What should I do if the P1B41 code returns after repairs?

If the code reappears, further diagnostic testing may be needed to identify any remaining issues, and it may be necessary to consult a specialist in hybrid or electric vehicle systems.