Ford Focus Owners Manual: Coded keys
Note: Do not shield your keys with metal objects. This may prevent the receiver from recognising your key as a valid one.
Note: Have all of your remaining keys erased and recoded if you lose a key. Ask your dealer for further information. Have replacement keys recoded together with your existing keys.
If you lose a key, you can obtain a replacement from your Ford Dealer. If possible, provide them with the key number from the tag provided with the original keys. You can also obtain additional keys from your Ford Dealer.
Principle of operation
The engine immobiliser is a theft
protection system that prevents someone
from starting the engine with an
incorrectly coded key. ...
Arming the engine immobiliser
The engine immobiliser is armed
automatically a short time after you have
switched the ignition off.
The indicator in the instrument cluster will
flash to confirm that the system is
operating. ...
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serious p ...
Nissan Frontier - Instrument Panel - Keys - Brake system
