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Truck Key Programming Many customers will visit your shop with keys/fobs that are ruined. Many customers will pay to repair the key or fob. Most key fobs have to be programmed within a specified period of time by turning the ignition "On" and then "Off". The vehicle will go into an 'initiation' mode, which is usually identified by the door locks cycling or a loud chime. Keys The ability of mechanics to program and create keys and fobs is among the most valuable skills they can have.