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P064F 2017 GMC Sierra Code - Unauthorized Software/Calibration Detected

Quick Answer

The P064F code indicates that the vehicle's Engine Control Module (ECM) has detected unauthorized software or calibration within its systems. Common causes include Unauthorized Software Modifications: Installation of aftermarket performance chips or tuning software that is not compatible with the vehicle, Corrupted Software Updates: Incomplete or failed updates to the ECM software can lead to discrepancies, Faulty ECM: A malfunctioning ECM may incorrectly flag the software as unauthorized. 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 Unauthorized Software Modifications: Installation of aftermarket performance chips or tuning software that is not compatible with the vehicle, Corrupted Software Updates: Incomplete or failed updates to the ECM software can lead to discrepancies, Faulty ECM: A malfunctioning ECM may incorrectly flag the software as unauthorized.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 27, 2024
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Code P064F 2017 GMC Sierra Description

The P064F code indicates that the vehicle's Engine Control Module (ECM) has detected unauthorized software or calibration within its systems. This code is particularly relevant for modern vehicles equipped with complex electronic systems that rely on precise software to manage engine performance, emissions, and overall vehicle functionality. When the ECM identifies a discrepancy in the software or calibration data, it triggers this diagnostic trouble code (DTC) as a warning signal.

OBDII Code P064F 2017 GMC Sierra - Unauthorized Software/Calibration Detected
P064F 2017 GMC Sierra Code - Unauthorized Software/Calibration Detected

Common Causes of P064F 2017 GMC Sierra

  1. Unauthorized Software Modifications: Installation of aftermarket performance chips or tuning software that is not compatible with the vehicle.
  2. Corrupted Software Updates: Incomplete or failed updates to the ECM software can lead to discrepancies.
  3. Faulty ECM: A malfunctioning ECM may incorrectly flag the software as unauthorized.
  4. Electrical Issues: Problems with wiring or connections to the ECM can cause erroneous readings.
  5. Previous Repairs: Improperly performed repairs or modifications by previous owners or technicians can introduce unauthorized calibrations.

Symptoms of P064F 2017 GMC Sierra

  1. Check Engine Light: The most common symptom is the illumination of the check engine light on the dashboard.
  2. Reduced Engine Performance: Drivers may notice a decrease in power, acceleration, or overall engine responsiveness.
  3. Increased Fuel Consumption: The vehicle may exhibit lower fuel efficiency due to improper engine management.
  4. Erratic Transmission Behavior: Shifting may become rough or unpredictable, affecting drivability.
  5. System Failures: Various systems, such as ABS or traction control, may malfunction or fail to operate correctly.

How to Fix P064F 2017 GMC Sierra

  1. Diagnostic Scan: Begin with a comprehensive diagnostic scan to confirm the P064F code and check for any related codes.
  2. Inspect Software Integrity: Verify the integrity of the ECM software and calibration against manufacturer specifications.
  3. Reprogram ECM: If unauthorized software is detected, reprogram the ECM with the correct manufacturer-approved software.
  4. Check for Electrical Issues: Inspect wiring and connectors to ensure there are no shorts or loose connections affecting the ECM.
  5. Test Drive: After repairs, conduct a test drive to ensure that the code does not reappear and that all systems are functioning correctly.

Cost to Fix P064F 2017 GMC Sierra

Repair costs for addressing the P064F code can vary significantly based on the specific diagnosis and repair needed. Generally, the cost may range from $100 to $600, depending on whether a simple software reprogramming is required or if more extensive repairs are necessary. Labor rates typically range from $80 to $150 per hour, with metropolitan areas and dealerships often charging higher rates. Independent shops may offer lower rates. It is advisable to check local rates for a more precise estimate and to consider that the time required for diagnosis may also vary based on the complexity of the issue and the technician’s expertise.

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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 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.

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