AutoCodesGeneric – P1B06

P1B06 Code - Drive Motor 2 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
P1B06 indicates Drive Motor 2 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.
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Code Popularity 4,117
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 01, 2020
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Code P1B06 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 P1B06 - Drive Motor 2 Control Module High Voltage System Interlock Circuit - AutoCodes.com
P1B06 Code - Drive Motor 2 Control Module High Voltage System Interlock Circuit

What are the Possible Causes of the DTC P1B06?

  • 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 P1B06?

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 P1B06 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 P1B06 code?

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Need Help with the Code?

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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.

Discuss the causes and fixes for P1B06 OBDII Code

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