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I have a 05 plate coupe 2ltr se, can't turn immobiliser/alarm off with fobs, both fobs have new batteries and have ben sync'ed with car as per handbook, could it be a fault with body unit

Possible fault with alarm/immobiliser body unit, both fobs ahve new batteries and have been sync'd as per owners manual

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  • 560 Answers

This is a long shot but worth trying as it is free:

Disconnect both leads from the battery, contact the two removed leads together (this will diffuse the ECU memory and re-boot the system)
leave for a few minutes then reconnect.
(The above can lose a radio code if applicable)

This can reconfiger the systems and sort out a multitude of issues.

Hope it sorts it out for you.

Posted on Feb 16, 2012

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Posted on Jan 02, 2017

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SOURCE: changed battery in key fob now unable to turn

there will be a combination of button presses required to reconfigure your fob to the immobiliser. you dont need to get it recoded so dont pay for it. try these:
hold the a button down for ten seconds until the light comes on constantly. then press it twice quickly and it will reprogram.
or press lock about ten times, then open ten times. this should work.
i had this problem on a rover and just pressing the buttons loads of times may allow it to be reprogrammed.
also check the battery isnt upside down in the fob.

Posted on Aug 21, 2009

  • 52 Answers

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

Posted on Apr 29, 2010

  • 4102 Answers

SOURCE: hi,immobiliser problem?battery went flat,,managed to

Hi it sounds like you have done everything you can do, it now looks like your going to need to get the immobilizer reset, this can be done at most garages but its best if you shop around to see the best price you can get as its not cheap.

have you tried locking the door with the key and then opening it with the key then try the car see if it will work.

failing that its going to need the imob re-programming so that it accepts your key fob, it may just be that you need the fob replacing as the chip inside could have failed they will be able to test all this for you.

let me know if you need further assistance, not that theirs much more i can do without being their with the equipment to test the immobilizer, hopefully it will just be the fob that needs replacing.

you could just try one last thing when you get in the car and put the key in the ignition try holding the fob as close as you can to the ignition barrel as this is where it picks the signal up from so try holding it close to their and see if that then lets you start the car

failing that its going to be a trip to the garage.

plz rate this solution as i have a whole page of unrated posts, thanks

Posted on Aug 31, 2010

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Fob still won't work after new battery and nothing wrong with the contact inside, do not hae original code for the Kia sportage 1998 so what is the next best thing ,to do?


When replacing the key fob battery there is no reprogramming required! If the key fob was working prior to the battery replacement then it would point to the contacts not being correct! Remove key fob battery and start again!

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The FOB has got an immobiliser circuit built in. It looks like some water has got in.

It may not work but what I'd try is this. Open the FOB, take out the battery (Small silver disk) put the FOB somewhere warm to dry out thoroughly. (At least 24 hours) Now I'd go and get a new battery while this is going on. Once dry, re-assemble with the new battery.

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I had the same problem with mine

your key fob is now out of sync with the ECU to sync them just follow this link (renault will charge up to £180 for new key and to sync it)

http://renaulthelp.110mb.com/ImmBypass.html

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