AutoCodes – Buick – P1B03 Buick

P1B03 Buick Code - Drive Motor 1 Position Sensor Circuit 2 High Voltage

Quick Answer

The drive motor position sensor is monitored by the motor control module. Common causes include Faulty Drive Motor 1 Position Sensor, Drive Motor 1 Position Sensor harness is open or shorted, Drive Motor 1 Position Sensor 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: P1B03 Buick indicates Drive Motor 1 Position Sensor Circuit 2 High Voltage.
Common causes: Common causes include Faulty Drive Motor 1 Position Sensor, Drive Motor 1 Position Sensor harness is open or shorted, Drive Motor 1 Position Sensor 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 1,410

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 Aug 07, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B03 Buick Description

The drive motor position sensor is monitored by the motor control module. The motor control module monitors the angular position, speed, and direction of the drive motor 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. At vehicle ON, the motor control module outputs a 7 V 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 return signals, often referred to as Sine and Cosine waveforms, abbreviated SIN and COS. 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 coil signals allows the motor control module to determine the exact position, speed, and direction of the drive motor rotor. The drive motor 1 position sensor is serviceable separately from the drive motor assembly. The Diagnostic Trouble Code (DTC) will be set when the motor control module is unable to track the motor position based upon the sensor signals.

OBDII Code P1B03 Buick - Drive Motor 1 Position Sensor Circuit 2 High Voltage - AutoCodes.com — P1B03 Buick Code - Drive Motor 1 Position Sensor Circuit 2 High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B03 Buick?

Faulty Drive Motor 1 Position Sensor
Drive Motor 1 Position Sensor harness is open or shorted
Drive Motor 1 Position Sensor circuit poor electrical connection
Faulty Power Inverter Module

How to Fix the DTC P1B03 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 P1B03 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 P1B03 Buick Code

1. What are common symptoms of OBDII code P1B03 Buick Drive Motor 1 Position Sensor Circuit 2 High Voltage?

- Common symptoms include the check engine light illuminating, reduced engine power, and potential drivability issues.

2. What are possible causes of OBDII code P1B03 Buick Drive Motor 1 Position Sensor Circuit 2 High Voltage?

- Possible causes may include a faulty drive motor position sensor, damaged wiring or connectors, issues with the drive motor itself, or problems with the hybrid powertrain system.

3. How can I diagnose OBDII code P1B03 Buick Drive Motor 1 Position Sensor Circuit 2 High Voltage?

- Diagnosis typically involves using a scan tool to retrieve the fault code, inspecting the drive motor position sensor and related components, and testing the wiring for any shorts or opens.

4. Can I still drive my Buick with OBDII code P1B03 Drive Motor 1 Position Sensor Circuit 2 High Voltage?

- It is not recommended to drive your Buick with this code present, as it can lead to further damage and potential safety issues. It's best to address the problem promptly.

5. How can I repair OBDII code P1B03 Buick Drive Motor 1 Position Sensor Circuit 2 High Voltage?

- Repair may involve replacing the drive motor position sensor, repairing any damaged wiring or connectors, addressing issues with the drive motor, or seeking assistance from a professional technician.

6. Is resetting the OBDII code P1B03 Buick Drive Motor 1 Position Sensor Circuit 2 High Voltage sufficient?

- Simply resetting the code may temporarily turn off the check engine light, but it will not fix the underlying issue causing the fault code. Proper diagnosis and repair are necessary.

7. Can environmental factors trigger OBDII code P1B03 Buick Drive Motor 1 Position Sensor Circuit 2 High Voltage?

- Extreme temperatures, moisture, or other environmental factors can potentially impact the drive motor position sensor circuit and contribute to the occurrence of this fault code.

8. How long does it typically take to repair OBDII code P1B03 Buick Drive Motor 1 Position Sensor Circuit 2 High Voltage?

- The repair time can vary depending on the specific cause of the issue and the extent of repairs needed. It could range from a few hours to a full day, depending on the complexity.

9. Will OBDII code P1B03 Buick Drive Motor 1 Position Sensor Circuit 2 High Voltage affect the vehicle's fuel efficiency?

- Yes, if left unresolved, this code can lead to drivability issues that may affect the vehicle's fuel efficiency. Resolving the issue can help maintain optimal fuel economy.

10. Can I prevent OBDII code P1B03 Buick Drive Motor 1 Position Sensor Circuit 2 High Voltage from occurring?

- Regular maintenance, such as checking and servicing the hybrid powertrain system components, can help prevent issues that may trigger this fault code.