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Engine-Codes – GMC – P064F 2016 GMC Sierra

P064F 2016 GMC Sierra Code - Unauthorized Software/Calibration Detected

Quick Answer

The P064F diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected unauthorized software or calibration within the vehicle's electronic control systems. Common causes include Unauthorized modifications to the ECM software or calibration, such as performance tuning, Corrupted or incomplete software updates during servicing, Incompatible aftermarket parts that require specific calibrations. 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 2016 GMC Sierra indicates Unauthorized Software/Calibration Detected.
Common causes
Common causes include Unauthorized modifications to the ECM software or calibration, such as performance tuning, Corrupted or incomplete software updates during servicing, Incompatible aftermarket parts that require specific calibrations.
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 25, 2024
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Code P064F 2016 GMC Sierra Description

The P064F diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected unauthorized software or calibration within the vehicle's electronic control systems. This code is particularly relevant for modern vehicles like the 2016 GMC Sierra, which rely heavily on complex software algorithms to manage engine performance, emissions, and various other vehicle functions. When this code is triggered, it suggests that the ECM has identified a discrepancy between the expected software calibration and what is currently installed.

OBDII Code P064F 2016 GMC Sierra - Unauthorized Software/Calibration Detected
P064F 2016 GMC Sierra Code - Unauthorized Software/Calibration Detected

Common Causes of P064F 2016 GMC Sierra

  1. Unauthorized modifications to the ECM software or calibration, such as performance tuning.
  2. Corrupted or incomplete software updates during servicing.
  3. Incompatible aftermarket parts that require specific calibrations.
  4. Faulty wiring or poor connections in the ECM circuit.
  5. Malfunctioning sensors that provide erroneous data to the ECM, leading to software conflicts.

Symptoms of P064F 2016 GMC Sierra

  1. Check Engine Light (CEL) illuminated on the dashboard.
  2. Decreased engine performance or power loss.
  3. Erratic engine behavior, such as stalling or misfiring.
  4. Increased fuel consumption and reduced fuel efficiency.
  5. Difficulty in starting the vehicle or prolonged cranking time.

How to Fix P064F 2016 GMC Sierra

  1. Diagnostic Scan: Begin with a comprehensive diagnostic scan to confirm the P064F code and check for any related codes that may provide additional context.
  2. Inspect Software: Review the ECM software version and compare it with the manufacturer’s specifications to identify any unauthorized changes or updates.
  3. Reflash ECM: If unauthorized software is detected, reflash the ECM with the correct manufacturer-approved calibration software to restore proper functionality.
  4. Check Wiring and Connectors: Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections that could affect the ECM’s performance.
  5. Test Components: Conduct tests on related sensors and components to ensure they are functioning correctly and providing accurate data to the ECM.

Cost to Fix P064F 2016 GMC Sierra

The cost to address a P064F code can vary widely based on the underlying cause and the specific repairs required. On average, the total repair costs may range from $150 to $600. This estimate includes potential costs for diagnostic scans, software updates, and any necessary repairs to wiring or components. Labor rates can differ significantly based on location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour; however, rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It’s advisable to check local rates for a more precise estimate and to get a detailed quote based on the specific diagnosis and repairs needed.

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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 2016 GMC Sierra Code

1. What does the OBDII code P064F mean for a 2016 GMC Sierra?

P064F indicates "Unauthorized Software/Calibration Detected," meaning the vehicle's control module has identified non-factory programming or an unauthorized calibration.

2. What are common symptoms of the P064F code on a 2016 GMC Sierra?

Symptoms may include a check engine light, reduced engine performance, potential warranty issues, or no noticeable symptoms depending on the modifications.

3. What causes the P064F code to appear?

The code is typically triggered by aftermarket tuning, unauthorized software updates, or incorrect calibration of the vehicle's control module.

4. Can the P064F code affect the vehicle’s performance?

It may affect performance if the aftermarket software or calibration is incompatible or improperly installed, but in some cases, performance remains unchanged.

5. Is it safe to drive with the P064F code on my 2016 GMC Sierra?

It is generally safe to drive, but the code could impact warranty coverage or cause issues if the calibration is improperly done.

6. How can I fix the P064F code on a 2016 GMC Sierra?

Restoring the factory software or calibration using a GM-approved tool or technician will typically resolve the issue.

7. Can a dealership detect the P064F code?

Yes, dealerships can detect this code, and it may void warranties if unauthorized modifications are found.

8. Will clearing the P064F code solve the problem?

Clearing the code without addressing the underlying unauthorized software or calibration will not prevent it from returning.

9. Can a faulty control module cause the P064F code?

It’s rare, but a malfunctioning control module might falsely report unauthorized software. Diagnosis is required.

10. How can I avoid the P064F code on my GMC Sierra?

Stick to factory-approved software updates and avoid aftermarket tuning or calibrations to prevent this code.

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