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2000 Carrera 2 coupe 6 speed: remote key fobs


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I have 2 keys for my 996.  I have replaced the batteries in both and, when I press the buttons, the red lights illuminate on both.  But only one key lock/unlocks the car door.  The other doesn't.  What could be wrong with the other key?

 

Thanks

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20 year old key fobs are going to fail, mostly because the circuit board inside the key fob fails.  If you changed the battery inside the key and it stops working, more than likely the circuit board has broken.  Options? Use the manual key to open and start car.  Or go the $$$ route of buying and having new key(s) programmed to the car.  Dealer only on that one.

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1 hour ago, DBJoe996 said:

20 year old key fobs are going to fail, mostly because the circuit board inside the key fob fails.  If you changed the battery inside the key and it stops working, more than likely the circuit board has broken.  Options? Use the manual key to open and start car.  Or go the $$$ route of buying and having new key(s) programmed to the car.  Dealer only on that one.

Thanks for your reply.  I thought that, if the red light on the key illuminates when pressing the button, the circuit board is not broken and is working properly.   Is that incorrect?

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My key stopped working over 10 years ago.  Does not work to lock/unlock car.  New battery in key fob did nothing, however the key fob red light does blink.  It just doesn't communicate with the car.  I figure the key circuit board is broken based on what I have read.  Been using the manual key in the door lock ever since.  No problem.

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6 minutes ago, DBJoe996 said:

My key stopped working over 10 years ago.  Does not work to lock/unlock car.  New battery in key fob did nothing, however the key fob red light does blink.  It just doesn't communicate with the car.  I figure the key circuit board is broken based on what I have read.  Been using the manual key in the door lock ever since.  No problem.

Thanks for this additional piece of information.

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11 hours ago, Loren said:

Also, worn out buttons or dirt inside the keyhead.

Thanks, Loren.  Would you recommend to use contact cleaner, compressed air or a product specifically designed to clean printed circuit boards?

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56 minutes ago, Philip54 said:

Thanks, Loren.  Would you recommend to use contact cleaner, compressed air or a product specifically designed to clean printed circuit boards?

I would use circuit board cleaner on the board but be careful as old rubberized buttons can tear with rough cleaning.

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