Change FOB battery.
SOURCE: key fob will not lock or unlock doors on 06 Sonata
Hi there
i have the same problem but mine is the sensor that is under the dash that is faulty so i had them disable it untill i can get a part that they need to order so i would have your dealer check the sensor .. if it is under warranty they will replace it for free
SOURCE: Key fob won't unlock or lock car VW Golf 2000
my mum had a similar problem and it turn out the code the key transmits to the engine had gone wrong she took it to a vw dealer and they reprogrammed the key. it works fine now and is a common problem. hope that helps
SOURCE: i need to reset my peugeot 406 key fob
Had same trouble with my 406, fixing no problem, with new battery in fob, insert into ignition, turn key, BUT DO NOT START ENGINE, hold button for about 10 seconds release button and remove key from ignition, then try and see if doors lock on remote, if not try again, had to do this a couple of times, and it worked, sorry to say that now my key fob button has completely fell apart, through ware and tare
SOURCE: My Porsche Cayenne S Key fob no longer unlocks the Door
unlock the door then press the lock button on remote and hold down for 20/30 secs.manual does say hold button.....
SOURCE: my Porsche Key fob no longer unlocks the doors
Insert key into door barrel or ignition lock and turn key, whilst doing this press the unlock/lock button, the led on the dash should flash to indicate this has initialised the key to the car, then remove key and test operation of remote. If this fails then a new remote plus coding to the car by your dealership is needed
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