P064F 2017 GMC Sierra Code - Unauthorized Software/Calibration Detected
Quick Answer
This is an internal fault detection of the transfer case control module. Common causes include Faulty Transfer Case Control Module, Transfer Case Control Module harness is open or shorted, Transfer Case Control Module 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
- P064F 2017 GMC Sierra indicates Unauthorized Software/Calibration Detected.
- Common causes
- Common causes include Faulty Transfer Case Control Module, Transfer Case Control Module harness is open or shorted, Transfer Case Control Module 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 P064F 2017 GMC Sierra Description
At each power-up, the transfer case control module runs a self-test on the following:
- EEPROM Checksum
- ROM Checksum
- RAM Checksum
- RAM Malfunction
- Missing, incorrect, or invalid software
The Diagnostic Trouble Code (DTC) will be set when the transfer case control module has detected an invalid calibration.
What are the Possible Causes of the DTC P064F 2017 GMC Sierra?
- Faulty Transfer Case Control Module
- Transfer Case Control Module harness is open or shorted
- Transfer Case Control Module circuit poor electrical connection
How to Fix the DTC P064F 2017 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 P064F 2017 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.
Need more information about the P064F 2017 GMC Sierra code?
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Frequently Asked Questions about P064F 2017 GMC Sierra Code
What does OBDII code P064F mean on a 2017 GMC Sierra?
This code indicates "Unauthorized Software/Calibration Detected," meaning the vehicle's control module has detected non-approved software or calibration changes.
What causes the P064F code to appear?
The most common causes include aftermarket tuning or modifications, incorrect reflashing of the ECU, or corrupted software in the control module.
What are the symptoms of the P064F code?
Symptoms may include a check engine light, reduced engine performance, or restricted access to certain vehicle functions.
Can aftermarket tuning trigger the P064F code?
Yes, aftermarket tuning or unauthorized modifications to the ECU can trigger this code.
Is the P064F code dangerous to drive with?
While the vehicle may still be drivable, it may experience reduced performance or other limitations. It's best to address the issue promptly.
How is the P064F code diagnosed?
A technician will use a diagnostic scanner to confirm the code, check for aftermarket modifications, and verify the integrity of the software and calibration in the control module.
Can the P064F code be cleared without fixing the issue?
Clearing the code without addressing the underlying problem may result in the code reappearing or continued performance issues.
Does the P064F code require replacing the ECU?
Not necessarily. In many cases, the issue can be resolved by restoring the original software or calibration settings.
How can the P064F code be fixed?
The solution typically involves reprogramming the ECU with factory-authorized software or removing unauthorized modifications.
Can a dealership fix the P064F code?
Yes, dealerships have access to factory-approved software and tools to reprogram the ECU and resolve the issue.
Discuss the causes and fixes for P064F 2017 GMC Sierra OBDII Code
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