P064F Buick 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 Buick 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 Buick 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 Buick?
- 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 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 P064F 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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Frequently Asked Questions about P064F Buick Code
1. What does the OBDII code P064F mean on a Buick?
P064F indicates that the vehicle's engine control module (ECM) or other control module has detected unauthorized software or calibration changes.
2. What are the common symptoms of code P064F on a Buick?
Common symptoms include the check engine light turning on, potential performance issues, and in some cases, the vehicle may enter a reduced power or limp mode.
3. What causes the P064F code to appear?
The code is typically triggered by unauthorized tuning, aftermarket software, or corrupted calibration data in the vehicle's control module.
4. Can the P064F code be caused by a malfunctioning control module?
Yes, a malfunctioning or corrupted control module may cause the P064F code if it incorrectly flags the software or calibration as unauthorized.
5. How do I fix the P064F code on my Buick?
To fix this code, verify the integrity of the software and calibration using a GM-approved scan tool. If unauthorized changes are detected, restore the factory software and calibration.
6. Can aftermarket modifications trigger the P064F code?
Yes, aftermarket modifications such as performance tuning or non-OEM software upgrades can trigger this code.
7. Is it safe to drive with the P064F code on my Buick?
While it may be safe to drive short distances, ignoring this code could lead to further issues, including potential performance problems or warranty concerns.
8. Will resetting the ECM clear the P064F code permanently?
Resetting the ECM may temporarily clear the code, but if unauthorized software or calibration is still present, the code will likely return.
9. Can a dealership detect unauthorized software causing the P064F code?
Yes, dealerships have diagnostic tools that can detect unauthorized software or calibration changes in the vehicle's control module.
10. Does the P064F code affect my vehicle’s warranty?
Yes, the presence of unauthorized software or calibration changes may void your vehicle's powertrain warranty. Check with your dealer for specifics.
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