P064F 2018 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 2018 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 2018 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 2018 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 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 P064F 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.
Need more information about the P064F 2018 GMC Sierra code?
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Frequently Asked Questions about P064F 2018 GMC Sierra Code
What does the OBDII code P064F mean on a 2018 GMC Sierra?
It indicates "Unauthorized Software/Calibration Detected," meaning the vehicle's control module has identified non-standard or modified software.
What are common symptoms of code P064F in a 2018 GMC Sierra?
Symptoms may include a check engine light, reduced engine performance, or limited functionality of certain vehicle systems.
What causes code P064F to appear on a 2018 GMC Sierra?
The primary cause is aftermarket tuning, unauthorized software calibration, or corrupted factory software in the control module.
Can code P064F affect vehicle performance?
Yes, it can potentially limit performance or disable specific systems to protect the vehicle from damage.
How can code P064F be resolved on a 2018 GMC Sierra?
It can often be fixed by restoring the factory software calibration or replacing the control module if necessary.
Does code P064F indicate a hardware issue?
No, it typically points to a software or calibration issue rather than a physical hardware problem.
Can code P064F be caused by a software update?
Yes, a failed or improper software update can trigger this code, especially if the update is incompatible.
Will clearing the code P064F fix the issue permanently?
No, simply clearing the code won’t resolve the underlying issue unless the software calibration is restored or corrected.
Can aftermarket tuners trigger code P064F in a 2018 GMC Sierra?
Yes, aftermarket tuners or modified software can often cause this code to appear.
Is code P064F covered under warranty for a 2018 GMC Sierra?
If the code is caused by unauthorized modifications, it may void the warranty, and repairs may not be covered.
Discuss the causes and fixes for P064F 2018 GMC Sierra OBDII Code
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