I have the same problem...
I dont know what to try as there are no indications of an O/Speed control button.
Though the problem might have something to do with the steering wheel controller that was replaced to accommodate a new head unit.
To turn off the overspeed warning on a Falcon aircraft, access the aircraft’s settings through the primary flight display or management system. Navigate to the "Warnings" or "Alerts" section, and locate the overspeed warning option. You can then disable it by toggling the setting off. Always refer to the aircraft's operating manual for specific instructions, as the procedure may vary by model.
You can set yourself a maximum speed limit. If you exceed this you will be notified. You can activate/deactivate this function using the button on end of wiper stick. You set the required speed by driving at that speed and pressing the button
You can turn off the seatbelt warning light in your 2006 Ford Explorer, by buckling the seatbelts. When the seat is occupied the warning light will stay on until the seatbelt is buckled.
buckle up
If the warning lights will not turn off it could be the on and off switch. It could also be the relay switch.
To reset the oil change warning in a Ford F-250, turn the ignition to the "On" position without starting the engine. Press the accelerator pedal three times within 10 seconds. After that, turn the ignition off and then start the engine to ensure the oil change light has been reset. If successful, the warning should no longer be displayed.
You can turn off the 2009 Toyota Camry seatbelt warning light by engaging the seatbelt. You can also remove the seatbelt warning light fuse. Removing the seatbelt warning light fuse is not recommended.
The ABS warning light can only be turned off with a specialized scan tool - or - fix the problem. See "Related Questions" below for more
To reset the oil change warning on a 2010 Ford Escape, first turn the ignition to the "On" position without starting the engine. Then, press the gas pedal three times within five seconds. Finally, turn the ignition off and start the engine to ensure the oil change light is reset. If successful, the warning light should no longer be illuminated.
Put on the seat belt.
Get your engine checked
To turn off the over-speed warning on a 2003 BA Ford Falcon, you typically need to access the vehicle's settings through the dashboard display. Use the trip computer controls on the steering wheel or dashboard to navigate to the settings menu. Look for the option related to speed warnings and disable it. If the option is not available, consult the owner's manual for specific instructions or visit a Ford dealership for assistance.