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Posted on Apr 14, 2017
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2002 buick century key fob problem

On a 2002 Buick Century, the trunk unlocks, whenever you lock or unlock the doors using either fob. Both fobs are the originals that came with the car, and worked correctly up until now. To clarify: If you press the door lock button on either fob, the doors lock, and the trunk unlocks and releases. If you press the door unlock button on either fob, the door(s) unlock(s), and the trunk unlocks and releases. If you the trunk release button, the trunk unlocks and releases, like it's supposed to. The door locks are not activated (as they should not be). Anyone have any idea what may be causing this?

  • Al Schrader
    Al Schrader Jan 24, 2018

    Sounds like a short circuit - something the dealer would have to fix.
    This could be annoying. If you can live with it, temporarily unplug the trunk release connector and just use your key for the trunk.
    This could buy you some time until you can take it to the dealer.

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1 Answer

EdCarCal

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  • Buick Master 1,326 Answers
  • Posted on Apr 18, 2017
EdCarCal
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Sounds like the remote receiver module in the car is malfunctioning and will probably need to be replaced.

4 Related Answers

freetek

Steve Allison

  • 5569 Answers
  • Posted on Mar 06, 2009

SOURCE: 2002 Buick Century auto door unlock requires

It may be failing contacts in your remote; these are normally little carbon buttons that can either get fouled with contaminents or wear out if made too thin.
You may have to replace the remote to regain normal function. 

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Anonymous

  • 107 Answers
  • Posted on Jun 27, 2010

SOURCE: buick rendezvous remote reciever in rear door

check for power to solenoid , repair wiring or replace solenoid (actuator)

Anonymous

  • 1949 Answers
  • Posted on Dec 09, 2010

SOURCE: My father's 2001 Buick Century has a trunk

control module in the drivers door or up under dash

Anonymous

  • 1 Answer
  • Posted on Mar 08, 2011

SOURCE: one minute my 2001 Buick century trunk openned the

The wires in the trunk that run up by the right hinge are broken.

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Sit in the driver's seat
Close all vehicle doors; ignition key should NOT be in the ignition, and ignition should be OFF.
Press and hold UNLOCK on your driver's door lock switch, insert and remove your ignition key TWICE, and insert the key in the ignition; this time LEAVE IT. DO NOT TURN THE KEY!!
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If you wish to use more the one transmitter (4 MAX), press and hold lock and unlock just as the first transmitter.

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2002 Buick Century auto door unlock requires

It may be failing contacts in your remote; these are normally little carbon buttons that can either get fouled with contaminents or wear out if made too thin.
You may have to replace the remote to regain normal function. 
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Keyless entry remote

TRY PUTTING IT IN IGNITION TURN IT SO DASH LIGHTS UP THEN PRESS THE FOB WORKED ON MY CAR BUT MINE WAS A ASTRA
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