AutoCodes – GMC – P0A3F GMC

P0A3F GMC Code - Drive Motor 1 Position Sensor Circuit

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: P0A3F GMC indicates Drive Motor 1 Position Sensor Circuit.
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 1,665

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 06, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0A3F GMC 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 cannot determine the motor position based on the sensor signals.

OBDII Code P0A3F GMC - Drive Motor 1 Position Sensor Circuit - AutoCodes.com — P0A3F GMC Code - Drive Motor 1 Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P0A3F GMC?

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 P0A3F GMC?

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 P0A3F GMC 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.

Need more information about the P0A3F GMC code?

Need more information on how to fix the P0A3F GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0A3F GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P0A3F 2016 GMC Sierra — Drive Motor Position Sensor Circuit
P0A3F 2017 GMC Sierra — Drive Motor Position Sensor Circuit
P0A3F 2018 GMC Sierra — Drive Motor Position Sensor Circuit

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 P0A3F GMC Code

1. What are the common symptoms of OBDII code P0A3F GMC (Drive Motor 1 Position Sensor Circuit)?

- Common symptoms include reduced engine power, difficulty accelerating, and an illuminated check engine light.

2. What can cause the OBDII code P0A3F GMC to appear?

- The code may be triggered by a faulty drive motor 1 position sensor, damaged wiring or connectors, or issues with the drive motor itself.

3. How serious is the OBDII code P0A3F GMC?

- This code can affect the performance and drivability of the vehicle, so it is important to address it promptly to prevent further damage.

4. How can I diagnose the issue related to the Drive Motor 1 Position Sensor Circuit?

- Diagnosing the problem typically involves using a scan tool to retrieve the specific code, checking the wiring and connectors for damage, and testing the drive motor position sensor.

5. Can I still drive my vehicle with the OBDII code P0A3F GMC present?

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

6. How can I repair the Drive Motor 1 Position Sensor Circuit issue?

- Repairing the issue may involve replacing the drive motor 1 position sensor, repairing damaged wiring or connectors, or addressing any underlying drive motor problems.

7. Will resetting the check engine light resolve the OBDII code P0A3F GMC?

- Simply resetting the check engine light will not fix the underlying issue causing the code. It is important to diagnose and repair the problem to prevent it from recurring.

8. Are there any maintenance tips to prevent the OBDII code P0A3F GMC from reoccurring?

- Regularly inspecting and maintaining the drive motor components, including the position sensor, wiring, and connectors, can help prevent this code from reoccurring.

9. Can a DIY enthusiast fix the OBDII code P0A3F GMC issue?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this issue. However, professional help is recommended for complex repairs.

10. How much does it typically cost to repair the Drive Motor 1 Position Sensor Circuit issue?

- The cost of repairing the issue can vary depending on the specific cause of the problem, but it may range from a few hundred to over a thousand dollars, including parts and labor.