OBD II Fault Code

  • OBD II P064F

OBD-II Code Engine may not start is defined as a Unauthorized Software/Calibration Detected

The engine control module (PCM) has failed its own self-test. The PCM will set code P064F.

Engine may not start Symptoms

  • Engine may not start

Common Problems That Trigger the P064F Code

  • Aftermarket programmer has been added to the vehicle
  • Powertrain Control Module (PCM) failure
  • Powertrain Control Module (PCM) software needs to be updated
  • Wiring issue
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