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Thread: Transponder Key Problems

  1. #1
    Regular Member Vecmaniac's Avatar
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    confused Transponder Key Problems

    Is it possible that the module that takes care of the ignition keys can de-register a key?

    My second key has mysteriously stopped working and won't open the doors etc. I have tried a new battery in the fob but still no joy. I reckon the transponder in the key is simply bust but I was wondering if the car may have 'forgotten' the key?

    Anyone had a similar problem? Can I get the transponder replaced (non flip key) without having to get another blade cut?

  2. #2
    Full Member Big Sig's Avatar
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    The transponder bit is the expensive part. One of my old keys stopped working with the car and i had to have it tech 2'd to the car again.
    Now I need a turbo to keep up!

  3. #3
    Regular Member Vecmaniac's Avatar
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    Was your key faulty Sig or did the car just forget it?

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    Full Member Big Sig's Avatar
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    Not sure. I didn't use it for over a year. When it went in for a service I asked for it to be recoded to the car, cost me £20 but it worked again after so I guess it wasn't faulty
    Now I need a turbo to keep up!

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    Regular Member macdad's Avatar
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    Take a look at this guy might the very thing...
    http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA:IT&ih=011

  6. #6
    Regular Member benny's Avatar
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    if the car has had a new cim fitted at some point in its life and the spare key wasnt prestent at time of programing the key will not be programed to the car this happens loads ..customers loose the key .then find it or they cant be bothered to return the car when we ask them to to get it coded ...or the dealer just didnt ask for the spare key ....it is unusuall for a cim to forget just one key normaly if there is a fault the cim will forget all keys programed ,.

    also the key may be faulty and not the car

  7. #7
    Regular Member Vecmaniac's Avatar
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    Quote Originally Posted by benny View Post
    if the car has had a new cim fitted at some point in its life and the spare key wasnt prestent at time of programing the key will not be programed to the car this happens loads ..customers loose the key .then find it or they cant be bothered to return the car when we ask them to to get it coded ...or the dealer just didnt ask for the spare key ....it is unusuall for a cim to forget just one key normaly if there is a fault the cim will forget all keys programed ,.

    also the key may be faulty and not the car

    Cheers Benny, up until recently the key worked no problems. I guess there is no way to see if the key is transmitting apart from tech 2?

  8. #8
    [Ex]Admin Duncan's Avatar
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    Have you tried resynching the key to the car as explained in the manual?

  9. #9
    Regular Member Vecmaniac's Avatar
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    Okay, Duncan, you have set me off on a train of thought... After reading said manual my theory is that the said troublesome key has been in the missus's bag and has been constantly transmitting thus disabling the key. I went outside and started the car with the second key and hey presto, on the second start the key began to work again.

    I did some experimenting and found that if I locked / unlocked the car with my wife's key 9 times BOTH of my keys were disabled and starting the car twice re-activated them. When I repeated the procedure with my flipkey it took 7 locks/unlocks to disable both keys again.

    Thing is while my wife's key wasn't working my own flip was. The only explanation for this that I can think of is that while I was experimenting tonight both keys were in the car thus explaining how both keys were disabled at the same time???

    Thanks Duncan (and everyone else!) sometimes the owners handbook is forgotten about as a source of information other than tyre pressures etc.

    Why is it that women's bag's are so full... and of what??
    Last edited by Vecmaniac; 8th November 2008 at 22:45.

  10. #10
    [Ex]Admin Duncan's Avatar
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    Glad you're sorted, although kinda bizarre your findings about both keys then stopping working. It's normal for one key to become unsynched if the key fob is pressed numerous times out of range of the car, therefore no response from it, until it's resynched again.

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