AutoCodes – Chevrolet – P1B04 Chevrolet

P1B04 Chevrolet Code - Drive Motor 2 Position Sensor Circuit Loss of Tracking

Quick Answer

The drive motor generator position sensor is monitored by the motor control module. Common causes include Faulty Drive Motor Generator, Drive Motor Generator harness is open or shorted, Drive Motor Generator 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: P1B04 Chevrolet indicates Drive Motor 2 Position Sensor Circuit Loss of Tracking.
Common causes: Common causes include Faulty Drive Motor Generator, Drive Motor Generator harness is open or shorted, Drive Motor Generator 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 2,327

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B04 Chevrolet Description

The drive motor generator position sensor is monitored by the motor control module. The motor control module monitors the angular position, speed and direction of the drive motor generator rotor based upon the signals of the resolver-type position sensor. The position sensor contains a drive coil, two driven coils and an irregular shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the drive motor generator. At vehicle ON, the motor control module outputs a 7 volt ac, 10 kHz excitation signal to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular shaped rotor. The motor control module then monitors the two driven coil circuits for a return signal. The position of the irregular metallic rotor causes the magnetically-induced return signals of the driven coils to vary in size and shape. A comparison of the two driven coils signals allows the motor control module to determine the exact position, speed and direction of the drive motor generator rotor. The position sensor is a non-serviceable part of the drive motor generator.

OBDII Code P1B04 Chevrolet - Drive Motor 2 Position Sensor Circuit Loss of Tracking - AutoCodes.com — P1B04 Chevrolet Code - Drive Motor 2 Position Sensor Circuit Loss of Tracking

What does this mean?

What are the Possible Causes of the DTC P1B04 Chevrolet?

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

How to Fix the DTC P1B04 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 P1B04 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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Need more information on how to fix the P1B04 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P1B04 Chevrolet Code

1. What are the common symptoms of OBDII code P1B04 in a Chevrolet related to Drive Motor 2 Position Sensor Circuit Loss of Tracking?

The common symptoms include a check engine light, reduced power or acceleration, and potential drivability issues.

2. What are the possible causes of OBDII code P1B04 in a Chevrolet related to Drive Motor 2 Position Sensor Circuit Loss of Tracking?

Possible causes include a faulty drive motor position sensor, damaged wiring or connectors, software issues, or a malfunctioning drive motor.

3. How can I diagnose the OBDII code P1B04 in a Chevrolet related to Drive Motor 2 Position Sensor Circuit Loss of Tracking?

Diagnosis typically involves using a scan tool to retrieve the code, inspecting the drive motor position sensor and its circuit, checking for wiring or connector issues, and performing any necessary software updates.

4. Can I still drive my Chevrolet with OBDII code P1B04 related to Drive Motor 2 Position Sensor Circuit Loss of Tracking?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage and potentially unsafe driving conditions.

5. How can I repair OBDII code P1B04 in a Chevrolet related to Drive Motor 2 Position Sensor Circuit Loss of Tracking?

Repair options may include replacing the drive motor position sensor, repairing damaged wiring or connectors, updating software as needed, or addressing any other underlying issues causing the code.

6. Is it possible to reset the OBDII code P1B04 related to Drive Motor 2 Position Sensor Circuit Loss of Tracking without fixing the issue?

While you can clear the code temporarily, it will likely return if the underlying problem is not addressed. It's important to diagnose and repair the issue to prevent further issues.

7. Are there any DIY tips for troubleshooting OBDII code P1B04 in a Chevrolet related to Drive Motor 2 Position Sensor Circuit Loss of Tracking?

DIY tips may include visually inspecting wiring and connectors, checking for loose connections, and ensuring proper sensor alignment before seeking professional help if needed.

8. How serious is OBDII code P1B04 related to Drive Motor 2 Position Sensor Circuit Loss of Tracking in a Chevrolet?

This code should be taken seriously, as it can affect the performance and safety of your vehicle. It's important to address the issue promptly to prevent further damage.

9. Can a faulty drive motor position sensor cause other OBDII codes to appear in a Chevrolet?

Yes, a faulty drive motor position sensor can cause other related codes to appear, impacting the overall performance of the vehicle and potentially triggering additional warning lights.

10. How long does it typically take to repair OBDII code P1B04 related to Drive Motor 2 Position Sensor Circuit Loss of Tracking in a Chevrolet?

The repair time can vary depending on the exact cause of the issue and the extent of the repairs needed. It's best to consult with a professional technician for an accurate estimate.