AutoCodes – Buick – P0A46 Buick

P0A46 Buick Code - Drive Motor 2 Position Sensor Performance

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
P0A46 Buick indicates Drive Motor 2 Position Sensor Performance.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 901
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 07, 2020
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Code P0A46 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 P0A46 Buick - Drive Motor 2 Position Sensor Performance - AutoCodes.com
P0A46 Buick Code - Drive Motor 2 Position Sensor Performance

What are the Possible Causes of the DTC P0A46 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 P0A46 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 P0A46 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 P0A46 Buick Code

1. What does the OBDII code P0A46 mean on a Buick?

The P0A46 code indicates an issue with the Drive Motor 2 Position Sensor Performance, meaning the sensor is not providing accurate data about the position of the second drive motor.

2. What are the common symptoms of a P0A46 code in a Buick?

Symptoms may include reduced vehicle performance, difficulty accelerating, warning lights on the dashboard (such as the check engine light), or the vehicle switching to limp mode.

3. What causes the P0A46 code to appear in a Buick?

Common causes include a faulty drive motor position sensor, wiring issues, poor electrical connections, or problems with the hybrid system control module.

4. Can I drive my Buick with a P0A46 code?

Driving with this code is not recommended as it may cause reduced performance and could lead to further damage to the hybrid system.

5. How do I diagnose the P0A46 code on my Buick?

Diagnosis involves scanning the vehicle with an OBDII tool, inspecting the drive motor position sensor and its wiring, and testing the hybrid system control module for faults.

6. How is the P0A46 code fixed on a Buick?

Repairs may include replacing the drive motor position sensor, repairing or replacing damaged wiring, or addressing issues with the hybrid system control module.

7. How much does it cost to fix a P0A46 code in a Buick?

Repair costs can vary depending on the specific issue but typically range from $200 to $800, including parts and labor.

8. Can a dead battery cause the P0A46 code in a Buick?

A weak or failing hybrid battery is unlikely to directly cause the P0A46 code but may contribute to related electrical issues.

9. What tools are needed to troubleshoot the P0A46 code in a Buick?

Tools include an OBDII scan tool, a multimeter for testing electrical connections, and manufacturer-specific service manuals for guidance.

10. Is the P0A46 code specific to hybrid models of Buick?

Yes, this code is typically associated with hybrid or electric models, as it relates to the drive motor position sensor in the hybrid system.

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