P0A3F 2018 GMC Sierra Code - Drive Motor Position Sensor Circuit
Quick Answer
The generator control module, also called the starter/generator control module, is comprised of the following three control modules: the hybrid/EV powertrain control module 1, 14 V power module, and the drive motor control module. Common causes include Faulty Starter/Generator, Starter/Generator harness is open or shorted, Starter/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
- P0A3F 2018 GMC Sierra indicates Drive Motor Position Sensor Circuit.
- Common causes
- Common causes include Faulty Starter/Generator, Starter/Generator harness is open or shorted, Starter/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.
Code P0A3F 2018 GMC Sierra Description
The generator control module monitors the angular position, speed, and direction of the starter generator rotor based upon the signals of the resolver-type motor 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 starter generator.
At ignition ON, an AC voltage, 10 kHz excitation signal is output to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular-shaped rotor. The generator 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 generator control module to determine the exact position, speed, and direction of the starter generator rotor. The position sensor is a non-serviceable part of the starter generator.
What are the Possible Causes of the DTC P0A3F 2018 GMC Sierra?
- Faulty Starter/Generator
- Starter/Generator harness is open or shorted
- Starter/Generator circuit poor electrical connection
- Faulty Starter/Generator Control Module
How to Fix the DTC P0A3F 2018 GMC Sierra?
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 2018 GMC Sierra 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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Frequently Asked Questions about P0A3F 2018 GMC Sierra Code
1. What are the common symptoms of OBDII code P0A3F in a 2018 GMC Sierra?
- Common symptoms include reduced hybrid system performance, check engine light illumination, and potential drivability issues.
2. What does the OBDII code P0A3F for Drive Motor Position Sensor Circuit indicate in a 2018 GMC Sierra?
- This code indicates a problem with the drive motor position sensor circuit in the hybrid system of the vehicle.
3. What are some possible causes of OBDII code P0A3F in a 2018 GMC Sierra?
- Possible causes include a faulty drive motor position sensor, damaged wiring or connectors in the sensor circuit, or issues with the hybrid system control module.
4. How can I diagnose the cause of OBDII code P0A3F in my 2018 GMC Sierra?
- Diagnosing this code typically involves checking the drive motor position sensor, inspecting the sensor circuit wiring and connectors, and using a scan tool to gather data from the hybrid system.
5. What are some repair tips for addressing OBDII code P0A3F in a 2018 GMC Sierra?
- Repair tips may include replacing the drive motor position sensor if faulty, repairing any damaged wiring or connectors in the circuit, and resetting the trouble codes after the issue is resolved.
6. Can I continue to drive my 2018 GMC Sierra with OBDII code P0A3F active?
- It is not recommended to continue driving with this code active, as it can lead to further damage to the hybrid system components and potentially cause drivability issues.
7. How much does it typically cost to repair OBDII code P0A3F in a 2018 GMC Sierra?
- Repair costs can vary depending on the exact cause of the code, but it may involve sensor replacement, wiring repairs, or module reprogramming, potentially ranging from $200 to $800 or more.
8. Will clearing the OBDII code P0A3F in my 2018 GMC Sierra make it go away permanently?
- Clearing the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, the code is likely to reappear.
9. Is it possible to reset or recalibrate the drive motor position sensor to fix OBDII code P0A3F in a 2018 GMC Sierra?
- In some cases, recalibrating the drive motor position sensor may help resolve the issue, but it is essential to follow the manufacturer's specific procedures for your vehicle.
10. How can I prevent OBDII code P0A3F from reoccurring in my 2018 GMC Sierra after repair?
- Regular maintenance of the hybrid system components, such as checking sensor connections and ensuring proper wiring integrity, can help prevent the recurrence of this code.
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