AutoCodes – Chevrolet – P1B06 Chevrolet

P1B06 Chevrolet 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 Chevrolet 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 2,363

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
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Code P1B06 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 P1B06 Chevrolet - Drive Motor 2 Control Module High Voltage System Interlock Circuit - AutoCodes.com — P1B06 Chevrolet Code - Drive Motor 2 Control Module High Voltage System Interlock Circuit

What does this mean?

What are the Possible Causes of the DTC P1B06 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 P1B06 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 P1B06 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 P1B06 Chevrolet Code

1. What does the OBDII code P1B06 mean on a Chevrolet?

P1B06 indicates an issue with the Drive Motor 2 Control Module High Voltage System Interlock Circuit, which monitors the integrity of the high-voltage system in hybrid or electric vehicles.

2. What are the common symptoms of code P1B06 in a Chevrolet?

Symptoms may include the illumination of the check engine light, reduced vehicle performance, limited EV mode functionality, or a failure to start.

3. What causes the P1B06 code to appear on a Chevrolet?

Common causes include a faulty high-voltage system interlock circuit, loose or damaged connectors, wiring issues, or a malfunctioning Drive Motor 2 Control Module.

4. Can I drive my Chevrolet with the P1B06 code active?

It is not recommended to drive the vehicle with this code active, as it may indicate a high-voltage safety issue that could pose a risk to the vehicle or occupants.

5. How do I diagnose the P1B06 code in a Chevrolet?

Diagnosis typically involves checking the high-voltage interlock circuit for continuity, inspecting wiring and connectors, and scanning the system for additional trouble codes.

6. What repairs might fix the P1B06 code on a Chevrolet?

Repairs may include replacing damaged wiring, repairing or replacing connectors, or replacing the Drive Motor 2 Control Module if it is determined to be faulty.

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

Repair costs vary depending on the issue, but wiring repairs may cost a few hundred dollars, while replacing the Drive Motor 2 Control Module can cost significantly more.

8. Can a weak or discharged 12V battery cause the P1B06 code?

While unlikely, a weak 12V battery can sometimes contribute to electrical system issues, so itâ€™s worth checking the battery's condition during diagnosis.

9. Does the P1B06 code always require module replacement?

No, module replacement is not always necessary. Many cases are resolved by repairing wiring or connectors in the high-voltage system interlock circuit.

10. Is the P1B06 code specific to Chevrolet hybrid or electric vehicles?

Yes, this code is specific to Chevrolet vehicles equipped with hybrid or electric powertrains that utilize a high-voltage system interlock circuit.