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HOMESERVICE MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 683 (PASSIVE ANTI-THEFT SYSTEM (PATS) - VEHICLES WITH: PUSH BUTTON START)DESCRIPTION AND OPERATIONPASSIVE ANTI-THEFT SYSTEM (PATS) - SYSTEM OPERATION AND COMPONENT DESCRIPTIONSYSTEM OPERATIONNO KEY DETECTED MESSAGE
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD

No Key Detected Message

2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION No Key Detected Message
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Some brands/types of mobile phone or laptop computer chargers may cause interference that could lead to a PATS no-start if the passive key is within close proximity of the charger. If a concern is observed, move the passive key away from the charger and attempt to start the vehicle.

The No Key Detected message displays in the message center when:

  • the START/STOP button is pressed with the ignition OFF and a valid programmed passive key is not detected inside the vehicle.
  • the engine has been started or the ignition is in RUN and a passive key is no longer detected inside the vehicle.

The BCM activates all the PATS antennas to search the inside of the vehicle for a passive key every time a door or tailgate is opened and then closed. This strategy aids to prevent the passive key from being separated from an already running vehicle. If a passive key is no longer detected in the vehicle, the vehicle continues to run. If the START/STOP button is pressed to turn the vehicle OFF, the engine can be restarted without a passive key present inside the vehicle for approximately 20 seconds. During that time, Restart now or key is needed displays in the message center. After 20 seconds have elapsed, a passive key must be present to start the vehicle or transition the ignition out of ON.

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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.