When your 2020 Ford Explorer's push button start doesn't respond at all - no chime, no lights, nothing happens when you press it - multiple systems need investigation. Understanding how the keyless start system works helps isolate the failure point.
How Push Button Start Works
The 2020 Explorer's Intelligent Access system constantly searches for your key fob's signal. When you enter the vehicle with a valid fob and press the start button with the brake depressed, the system authenticates the key, verifies the brake is pressed, confirms the transmission is in Park, and then commands the starter. Any break in this chain prevents starting.
Key Fob Detection Issues
The most common cause of unresponsive push button start is key fob detection failure. Check the fob's battery (CR2032 type) - even partially depleted batteries can prevent reliable detection. Try the backup method: hold the fob directly against the start button where a low-power reader can detect it without relying on the fob's transmitter.
Brake Pedal Switch Diagnosis
The Explorer requires the brake pedal to be pressed before allowing starting. A failed brake pedal position switch sends no signal to the starting system. You may notice that pressing the brake doesn't illuminate the brake lights - if so, the switch needs replacement. Try pressing the brake pedal firmly several times before attempting to start.
System Not Recognizing Key
If the message center displays "No Key Detected" or similar, the intelligent access module isn't receiving the fob's signal. Multiple fobs on the same keyring, metal objects near the fob, or interference from other electronics can block communication. Try moving your phone and other electronics away from the key.
Battery and Power Issues
A severely depleted main battery can prevent the push button system from functioning even though you might see some instrument panel lights. The system requires a minimum voltage to operate its communication modules. If the battery has been disconnected or replaced, some modules may need time to reinitialize.
Reset Procedures
Try this reset: with the vehicle off, open and close the driver's door, press and release the brake pedal, wait 30 seconds, then try starting. This allows various modules to cycle through their wake routines. If the vehicle recently had battery work, driving for 20-30 minutes after a jump start allows all systems to fully reinitialize.