changed batteries

aidy

Newbie
Jul 19, 2006
27
0
hi all can anyone help i have just replaced the batteries in my key fob and it opens and locks the car but when i try to start the engine it turns over then just dies been told could be the immobiliser but i still dont know what to do lol:cry: :D thanks any help would be great
 

ibiza_95

1.8T MK2 Conversion
do a search for key fob re programming or something similar on here. im not sure if the keyfob would need reprogramming if you change the batteries or not, but if its the imobiliser thats causing you a problem, maybe try re programming it. only takes a few seconds, might take a few attempts, but the procedure for doing it has been posted many a time
 

andyj

There's no F in Quality..
Uh Oh...... if you've changed the battery and reprogrammed the key (which you must have done to get it to work the central locking), and now find that the car doesn't start....

Sounds to me like the little black transponder that sits inside the key could be missing.....

Remove the 'blade' part from the main body of the key, and on the inside of the plastic bit attached to the blade there should be a little black box, this is the transponder. Without it the immobiliser will just cut the fuel to the engine.
 

aidy

Newbie
Jul 19, 2006
27
0
replaced bateries in key fob

thanks for reply peops i think i have lost somthing but not sure opened the key fob and removed blade nothing thers just a piece of plastic and a bit of steel that i can see can some one send a picky of what im looking for i think could be at work but i dont know what im looking for:whistle: :confused: :lol:
 

andyj

There's no F in Quality..
you're looking for the thing with 'CV' on it in the below pic.... that's the transponder.

DSCF0176.jpg
 

Fl@pper

Back older greyer and less oilier but always hope
Jun 19, 2001
12,370
26
Gloucester
or similar

may not actually have CV written on it

if its missing - FIND IT

or you are looking to get a new key

got a spare key that works ???? you can swap it from that as a stopgap
 

aidy

Newbie
Jul 19, 2006
27
0
nice one

cheers for that i think this i definatly lost havnt got one inside of the fob :whistle: have got another key but it isnt a fob key just original key central locking still works though through the fob just wont start any one know if you can bu:confused: y the part ive lost or is it a new key and how much
 

andyj

There's no F in Quality..
new key from main dealer is about £90

your spare key will have the transponder molded into it.

you could always 'hide' the spare key under the dash, and then just use your fob key to open.close the car...... (note I don't recommend you do this.....)
 

Fl@pper

Back older greyer and less oilier but always hope
Jun 19, 2001
12,370
26
Gloucester
the 2nd key will have one of the chips you need inside if its starting the car ok

best plan (cheapest) is to open the original (non CL) one and remove the chip but dont cut it (usually fitted in the bottom) so peel the top apart

GLUE (as you lose em) it into the Y part of your central locking key so that one works the doors and starts the car

then get down your local locksmith who usually will be able to take your now complete CL key and clone it to a new solid type (same as you just cut open)

you then have it all sorted and back where you were but a solid key (clone) is usually a lot cheaper than getting your Y key replaced

last one i did cost me £12


PS - get us a pic as sometimes the solid types have a red box in it that is the top of a tray that holds the chip
 
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