Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2019EXPLORER XLT, 2.3L ENG VIN H, FWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS (EXCEPT DIESEL & HYBRID) - DTC P0607 - P2091DTC P064F - UNAUTHORIZED SOFTWARE/CALIBRATION DETECTED
2019 Ford Explorer XLT, 2.3L Eng VIN H, FWD
DTC P064F - Unauthorized Software/Calibration Detected
2019 Ford Explorer XLT, 2.3L Eng VIN H, FWDSECTION DTC P064F - Unauthorized Software/Calibration Detected
DTC DESCRIPTION P064F - UNAUTHORIZED SOFTWARE/CALIBRATION DETECTED
| Description: This DTC sets when the PCM has detected an unauthorized calibration. | |||
Possible Causes:
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| Diagnostic Aids: Reprogram or update the calibration. Reprogram the vehicle identification (VID) block (use as built data). Check for other DTCs or drive symptoms for further action. Check for aftermarket performance products. If it is necessary to install a new PCM, refer to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | Refer to the Description, Possible Causes and Diagnostic Aids for the DTC. | ||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.