AutoCodes – Chevrolet – P1B05 Chevrolet

P1B05 Chevrolet Code - Drive Motor 1 Control Module High Voltage System Interlock Circuit

Quick Answer

The high voltage interlock circuit is utilized to verify high voltage component integrity. Common causes include Faulty Drive Motor Generator Power Inverter Module, Drive Motor Generator Power Inverter Module harness is open or shorted, Drive Motor Generator Power Inverter Module circuit poor electrical connection. 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: P1B05 Chevrolet indicates Drive Motor 1 Control Module High Voltage System Interlock Circuit.
Common causes: Common causes include Faulty Drive Motor Generator Power Inverter Module, Drive Motor Generator Power Inverter Module harness is open or shorted, Drive Motor Generator Power Inverter Module circuit poor electrical connection.
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 1,641

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 01, 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 P1B05 Chevrolet Description

The high voltage interlock circuit is utilized to verify high voltage component integrity. High voltage interlock circuit is a circuit loop that passes through certain high voltage components. High voltage interlock circuit is used to determine if access to high voltage components is being attempted. The opening of these high voltage components causes the high voltage interlock circuit to open. The battery energy control module sources about 12 mA of current on the 5V high voltage interlock circuit loop. The battery energy control module monitors both the high voltage interlock source current circuit and the high voltage interlock return current circuit in order to detect circuit faults. Both motor control modules monitor the circuit for current in order to detect an open condition. When the battery energy control module and/or the motor control modules sense conditions such as a loss of high voltage interlock circuit current, the high voltage contactor relays are commanded open by the hybrid powertrain control module.

OBDII Code P1B05 Chevrolet - Drive Motor 1 Control Module High Voltage System Interlock Circuit - AutoCodes.com — P1B05 Chevrolet Code - Drive Motor 1 Control Module High Voltage System Interlock Circuit

What does this mean?

What are the Possible Causes of the DTC P1B05 Chevrolet?

Faulty Drive Motor Generator Power Inverter Module
Drive Motor Generator Power Inverter Module harness is open or shorted
Drive Motor Generator Power Inverter Module circuit poor electrical connection

How to Fix the DTC P1B05 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 P1B05 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.

Need more information about the P1B05 Chevrolet code?

Need more information on how to fix the P1B05 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1B05 Chevrolet 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 P1B05 Chevrolet Code

1. What are common symptoms of OBDII code P1B05 in a Chevrolet related to the Drive Motor 1 Control Module High Voltage System Interlock Circuit?

- Common symptoms include illuminated Check Engine Light, reduced power mode, and potential loss of electric drive capability.

2. What can cause the OBDII code P1B05 to trigger in a Chevrolet?

- The code can be triggered by issues with the drive motor control module, high voltage system interlock circuit faults, or damaged wiring connections.

3. How can I diagnose the OBDII code P1B05 in my Chevrolet related to the Drive Motor 1 Control Module High Voltage System Interlock Circuit?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the drive motor control module and related components, and testing the wiring for any faults.

4. Is it safe to continue driving my Chevrolet with the OBDII code P1B05 present?

- It is not recommended to continue driving the vehicle with this code present as it can lead to further damage and potential safety hazards.

5. How can I repair the OBDII code P1B05 in my Chevrolet related to the Drive Motor 1 Control Module High Voltage System Interlock Circuit?

- Repair may involve replacing the drive motor control module, repairing any faults in the high voltage system interlock circuit, or fixing damaged wiring connections.

6. Are there any common mistakes to avoid when dealing with the OBDII code P1B05 in a Chevrolet?

- One common mistake to avoid is ignoring the code and continuing to drive the vehicle, as this can lead to more severe issues down the line.

7. Can a DIY enthusiast repair the OBDII code P1B05 in a Chevrolet, or is it best left to professionals?

- While some simple checks like inspecting wiring connections can be done by DIY enthusiasts, diagnosing and repairing complex issues related to this code may be best left to professionals.

8. How much can I expect to pay to fix the OBDII code P1B05 in my Chevrolet?

- The cost to fix this code can vary depending on the exact cause of the issue, but it may involve parts replacement and labor costs that can range from a few hundred to over a thousand dollars.

9. Will resetting the Check Engine Light make the OBDII code P1B05 go away in my Chevrolet?

- Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return.

10. How long does it typically take to repair the OBDII code P1B05 in a Chevrolet?

- The repair time can vary based on the complexity of the issue and the availability of parts, but it may take a few hours to a full day to diagnose and fix the problem.