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Engine-Codes – Generic – P1B06

P1B06 Code - Drive Motor 2 Control Module High Voltage System Interlock Circuit

Quick Answer

The P1B06 diagnostic trouble code (DTC) relates to the Drive Motor 2 Control Module High Voltage System Interlock Circuit. Common causes include Faulty high voltage system interlock circuit, Wiring or connection issues in the control module, Corrosion or damage to electrical components. 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
P1B06 indicates Drive Motor 2 Control Module High Voltage System Interlock Circuit.
Common causes
Common causes include Faulty high voltage system interlock circuit, Wiring or connection issues in the control module, Corrosion or damage to electrical components.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P1B06 Description

The P1B06 diagnostic trouble code (DTC) relates to the Drive Motor 2 Control Module High Voltage System Interlock Circuit. This code indicates that there is a problem with the high voltage system interlock circuit in the control module for the drive motor 2. In hybrid and electric vehicles, the drive motor control module is responsible for managing the operation of the electric motor that propels the vehicle. The high voltage system interlock circuit is a safety feature that ensures the high voltage system is properly isolated and cannot be engaged accidentally, thereby preventing potential electrical hazards.

OBDII Code P1B06 - Drive Motor 2 Control Module High Voltage System Interlock Circuit
P1B06 Code - Drive Motor 2 Control Module High Voltage System Interlock Circuit

Common Causes of P1B06

  1. Faulty high voltage system interlock circuit
  2. Wiring or connection issues in the control module
  3. Corrosion or damage to electrical components
  4. Software or programming issues in the control module
  5. Environmental factors such as water intrusion or heat exposure

Symptoms of P1B06

  1. Loss of power or reduced acceleration
  2. Illumination of the check engine light
  3. Inability to engage the drive motor 2 system
  4. Erratic behavior of the electric motor
  5. Vehicle stalling or shutting down unexpectedly

How to Fix P1B06

  1. Begin by conducting a thorough inspection of the high voltage system interlock circuit and control module to identify any visible damage or loose connections.
  2. Test the electrical components and wiring using a multimeter to pinpoint any faults or shorts in the circuit.
  3. Address any corrosion or damage to the components by cleaning or replacing them as necessary.
  4. Update the software or reprogram the control module to ensure proper functionality.
  5. Once the repairs have been completed, clear the DTC and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P1B06

The typical repair costs for addressing a P1B06 DTC can vary depending on the extent of the issue and the specific components that require repair or replacement. In general, the cost of parts for this repair could range from $100 to $500, while the labor costs could be anywhere from $150 to $400. It's important to note that these estimates are approximate and actual costs may differ based on your location, the make and model of your vehicle, and the rates charged by the auto repair shop you choose. Be sure to obtain multiple quotes and compare prices before proceeding with the repair.

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Code P1B06 Information for Specific Makes

  • P1B06 Buick — Drive Motor 2 Control Module High Voltage System Interlock Circuit
  • P1B06 Cadillac — Drive Motor 2 Control Module High Voltage System Interlock Circuit
  • P1B06 Chevrolet — Drive Motor 2 Control Module High Voltage System Interlock Circuit
  • P1B06 GMC — Drive Motor 2 Control Module High Voltage System Interlock Circuit
  • P1B06 Saturn — Drive Motor 2 Control Module High Voltage System Interlock Circuit
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 P1B06 Code

1. What does the OBDII code P1B06 mean?

P1B06 indicates an issue with the Drive Motor 2 Control Module's High Voltage System Interlock Circuit, often related to a fault in the interlock wiring or a communication issue.

2. What are the common symptoms of the P1B06 code?

Symptoms may include an illuminated check engine light, reduced vehicle performance, failure to start, or limited operation of the high-voltage drive system.

3. What causes the P1B06 code to appear?

The code can be triggered by a faulty interlock circuit, damaged wiring, loose or corroded connectors, or a malfunction in the Drive Motor 2 Control Module itself.

4. Is it safe to drive with the P1B06 code?

No, it is not recommended to drive with this code as it involves the high-voltage system, which can pose safety risks or cause further damage to the vehicle.

5. How is the P1B06 code diagnosed?

A technician will use a scan tool to retrieve the code, inspect the wiring and connectors in the high-voltage interlock circuit, and test the Drive Motor 2 Control Module for faults.

6. Can I fix the P1B06 code myself?

Unless you are trained in high-voltage automotive systems, it’s best to leave this repair to a professional due to the potential safety hazards involved.

7. How much does it cost to repair the P1B06 code?

The repair cost varies depending on the exact fault but typically ranges from $150 to $500 or more, depending on labor and parts.

8. Can a dead battery cause the P1B06 code?

A weak or dead 12V battery is unlikely to cause this specific code, but a problem with the high-voltage system could indirectly affect startup or performance.

9. What tools are needed to troubleshoot the P1B06 code?

Common tools include an OBDII scanner, a multimeter for checking electrical connections, and possibly specialized equipment for high-voltage systems.

10. Will clearing the code fix the P1B06 issue?

Clearing the code may temporarily turn off the check engine light, but the underlying problem needs to be addressed to prevent it from returning.

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