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My key fob won't unlock my car nor does the security code. I figured out how to get doors unlocked. When I put the key in the ignition nothing at all will work. Not even the lights. Can someone help?

Posted by Anonymous on

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  • Cars & Trucks Master
  • 899 Answers

Could be the battery in the key fob is flat? try a new battery.

Posted on Apr 13, 2015

  • Anonymous Apr 13, 2015

    I already bought a new battery for fob. Still does nothing

  • Steve F Apr 13, 2015

    Ok, as Rhonda suggested, the door will open with the key only but the security system will nned to varify the electronic output on the fob matches your car. The fob is likely to be faulty and probably has lost its electronic security code output. I imagine that the only way to fix would be in getting a genuine key from a Dealer and getting them to recode it to your car.

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  • Cars & Trucks Master
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Doors usually do not need a chip to unlock, that is why I am able to keep a spare key with no chip in it hidden under my truck in case I lock myself out. The ignition DOES need the security code, which is for anti-theft purposes. First, make sure none of the buttons on your key fob are stuck down. Then, as Steve said, try replacing the battery. Good luck.

Posted on Apr 13, 2015

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SOURCE: c240 mercedes key wont turn seems locked

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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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