AutoCodes – Buick – P1B04 Buick

P1B04 Buick 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 Buick 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 883

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

What does this mean?

What are the Possible Causes of the DTC P1B04 Buick?

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 Buick?

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 Buick 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 P1B04 Buick Code

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

- Common symptoms include poor acceleration, reduced power output, and potential stalling of the vehicle.

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

- Potential causes may include a faulty drive motor position sensor, damaged wiring or connectors, or issues with the drive motor itself.

3. How can I diagnose OBDII code P1B04 in my Buick for Drive Motor 2 Position Sensor Circuit Loss of Tracking?

- Diagnosis typically involves using a scan tool to read the code, testing the drive motor position sensor, and inspecting the wiring and connectors for any damage.

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

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

5. How can I repair OBDII code P1B04 in my Buick indicating Drive Motor 2 Position Sensor Circuit Loss of Tracking?

- Repair may involve replacing the faulty drive motor position sensor, repairing any damaged wiring or connectors, and clearing the code with a scan tool.

6. Are there any DIY tips for addressing OBDII code P1B04 related to Drive Motor 2 Position Sensor Circuit Loss of Tracking in my Buick?

- DIY tips include checking for loose connections, inspecting the sensor for any physical damage, and consulting the vehicle's service manual for specific repair procedures.

7. How critical is it to address OBDII code P1B04 in my Buick for Drive Motor 2 Position Sensor Circuit Loss of Tracking promptly?

- It is important to address this code promptly to prevent potential drivability issues, further damage to the vehicle, and ensure safe operation.

8. Can weather conditions or driving habits contribute to triggering OBDII code P1B04 indicating Drive Motor 2 Position Sensor Circuit Loss of Tracking in a Buick?

- Extreme weather conditions or aggressive driving habits may potentially contribute to triggering this code by putting additional stress on the drive motor and its components.

9. How much can I expect to pay for repairing OBDII code P1B04 related to Drive Motor 2 Position Sensor Circuit Loss of Tracking in my Buick?

- Repair costs can vary depending on the exact cause of the issue, but they typically range from $200 to $500 including parts and labor.

10. Is it possible for OBDII code P1B04 in a Buick indicating Drive Motor 2 Position Sensor Circuit Loss of Tracking to reoccur after repair?

- If the root cause of the issue is not properly addressed during repair, there is a possibility for the code to reoccur. Regular maintenance and thorough diagnosis are essential to prevent this.