Immobiliser light flashing!

1. user_17232 Infrequent Poster Joined: Jul 2007 Omagh, NI Posts: 221 VTS mk2, 106GTI

   #1 30th July 2007, 18:42

   Hey guys I bought a 03 vtr with frontal damage a few days ago, it has been lying for a while. When the ignition is turned on the immobiliser light is flashing and the engine just turns over and won't start. What could be the problem?
   
   Cheers
2. user_17232 Infrequent Poster Joined: Jul 2007 Omagh, NI Posts: 221 VTS mk2, 106GTI

   #2 31st July 2007, 18:47

   anyone?
3. SaxoOllY Infrequent Poster Joined: Jun 2007 Posts: 129 1.6 Pug 306. Saxoo VTR

   #3 31st July 2007, 18:56

   Sounds like the immobilisers on and therefore wont let you start the engine!
   Your best bet would be to phone Citroen.
4. young-saxo Infrequent Poster Joined: Jul 2007 Anglesey Posts: 120 Saxo 1.1 desire mk2 02 plate

   #4 31st July 2007, 19:00

   i reckon u need to re-code the car keys in.
   take it to citroen, i think they charge about £60
5. SaxoOllY Infrequent Poster Joined: Jun 2007 Posts: 129 1.6 Pug 306. Saxoo VTR

   #5 31st July 2007, 19:19

   Quote:

   Originally Posted by young-saxo i reckon u need to re-code the car keys in. take it to citroen, i think they charge about £60

   That could well be it!!
6. user_17232 Infrequent Poster Joined: Jul 2007 Omagh, NI Posts: 221 VTS mk2, 106GTI

   #6 31st July 2007, 19:38

   awrite, cheers
7. liam7200 L-plater Joined: Jan 2008 manchester Posts: 64 1998 saxo vtr

   #7 1st February 2008, 10:19

   hey this some time does not work i have had this with mine i had the full computer done and the keys recoded and it still wont start ?? any one help
8. breamracer Newbie Joined: Mar 2008 Posts: 7

   #8 23rd March 2008, 21:44

   Quote:

   Originally Posted by liam7200 hey this some time does not work i have had this with mine i had the full computer done and the keys recoded and it still wont start ?? any one help

   I've had the exact same problem!!! try disconnecting the immobiliser.
9. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

   #9 24th March 2008, 13:46

   You need to get the engine running first then disconnect while the engine is running.
   
   Steve.
10. khj100 L-plater Joined: Nov 2007 York Posts: 82

    #10 24th March 2008, 20:31

    I had this problem with my VTS. After doing a lot of reading, it appears to mebe a sign that the signal from the key is too weak to be read. I'm lucky to have a few other 16v 106s/Saxos to try the ECU & immobiliser from and it worked fine with them.
    
    I got really fed up in the end, and when I finally got it started I un-immobilised it permanently by disconnecting the immobiliser box.
    
    I'd suggest anyone who gets the light flashing does the same, as one of these days it just won't pick the signal up at all and you'll be screwed!
11. terryswestcoast Newbie Joined: Feb 2009 milton keynes Posts: 2 saxo 1.4 west coast

    #11 5th March 2009, 19:54

    alrite guys does any one know how to dissconnect the immobiliser on 1998 saxo? would realy appreciate any help..

    1 user thanked this post: VTHall
12. wilsh81 Frequent Poster Joined: Jul 2008 stoke on trent Posts: 728 saxo VTR 98

    #12 5th March 2009, 19:59

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    1 user thanked this post: Rubiks
13. damion82 Newbie Joined: Feb 2009 Posts: 3

    #13 27th March 2009, 22:41

    Quote:

    Originally Posted by terryswestcoast alrite guys does any one know how to dissconnect the immobiliser on 1998 saxo? would realy appreciate any help..

    same problem if you get help or find out please let me no thanx
14. telliottuk Newbie Joined: Jul 2009 Posts: 2

    #14 3rd July 2009, 12:11

    try leaving your ignition switched on and then disconnect the negative side of the battery, replace the connection and start the engine, it worked for me this morning after the Citroen dealer told me I would have to get the key reprogrammed
15. telliottuk Newbie Joined: Jul 2009 Posts: 2

    #15 4th July 2009, 12:21

    doing the battery thing worked for a while then nothing, replaced the transponder ariel, no change , still doesnt turn the immobiliser off. Anybody have any ideas on how to get around this without it costing me a fortune
16. mario88 Newbie Joined: Mar 2010 Posts: 1

    #16 19th March 2010, 18:12

    Quote:

    Originally Posted by speedy8281 Hey guys I bought a 03 vtr with frontal damage a few days ago, it has been lying for a while. When the ignition is turned on the immobiliser light is flashing and the engine just turns over and won't start. What could be the problem? Cheers

    My Saxo did not start this morning. The yellow key immobiser light kept flashing. I changed the key with the spare one but the same thing happened. I tried again after half an hour and bingo it started! I have been searching the internet for a solution. There is a coil near the key barrel which they call transponder. This reads the key information on the chip in the key. If the signal is too weak or the transponder is defective the car would not start. I am trying to find a way to bypass this BS but so far I have not succeeded. Maybe someone knows how to!
17. merc2546 Infrequent Poster Joined: Aug 2010 swindon Posts: 225 1.1i

    #17 22nd September 2010, 21:26

    hey could u cable tie the key to the sender unit and just get another key or some thing
18. VTHall Saxperience Forum Bum Joined: Apr 2010 Telford Posts: 4501 Black corsa c SXI.

    #18 22nd September 2010, 21:54

    i wanna know how to disconnect my laerline immobilser as it does my head in :@
19. VTHall Saxperience Forum Bum Joined: Apr 2010 Telford Posts: 4501 Black corsa c SXI.

    #19 22nd September 2010, 21:55

    anyone?
20. merc2546 Infrequent Poster Joined: Aug 2010 swindon Posts: 225 1.1i

    #20 22nd September 2010, 22:20

    i want to know where u find it first
21. bryanw55 Newbie Joined: Apr 2011 Posts: 2

    #21 4th April 2011, 21:01

    hi can anyone help bought a non running saxo vtr 1990 immobiliser light on dash is flashing i took a ecu ignition barrel and coder ring that goes round barrel from a running saxo vtr same age and it still wont start? would an unlockd ecu work?
22. Jerran Newbie Joined: Apr 2011 Posts: 2

    #22 6th April 2011, 19:13

    Am I correct in thinking that if & when I can get my VTR to start up ( about 1 in ten tries it will fire due to the flashing immob light ) that to save this grief I can just disconnect the black immob box under the passenger side dash ? Should the car fire up fine each time after that ?
    
    The immobiliser doesn't worry me as the car is a track day toy.
23. Cityfan Newbie Joined: Mar 2012 Posts: 1

    #23 6th March 2012, 20:30

    I have had this same problem for several years on and off !!!!!!
    
    Sometimes it would take ages for the car to start but I didn't want to take an intermittent problem to a garage that they could not see. I did all sorts of silly things to try and get it to work, rub the key, take it out and put it back in, spit on it, push the car forward or backward a couple of feet etc
    
    Eventually I discovered that taking the key out and turning the steering wheel into lock and then unlocking it sorts the problem every time.
    
    I don't know if there is any logic to this?
24. adamspencer Infrequent Poster Joined: Feb 2012 Posts: 173 52 Saxo Desire 1.1

    #24 6th March 2012, 23:59

    sometimes the relay under ecu tray that controls immobiliser/fuel pump goes dodgy and causes these symptoms described;happened with mine. Check for power at the fuel pump. If there is, then you can rule out the relay but might aswell start with the simplest, as i had my keys recoded etc, transponder checked and it turned out to be the relay

    1 user thanked this post: Robert12345
25. adamspencer Infrequent Poster Joined: Feb 2012 Posts: 173 52 Saxo Desire 1.1

    #25 7th March 2012, 00:01

    Quote:

    Originally Posted by Jerran Am I correct in thinking that if & when I can get my VTR to start up ( about 1 in ten tries it will fire due to the flashing immob light ) that to save this grief I can just disconnect the black immob box under the passenger side dash ? Should the car fire up fine each time after that ? The immobiliser doesn't worry me as the car is a track day toy.

    yes this should work. Although if the engine cuts out before the immobiliser is removed then you unplug it, your ecu will be locked and it'll give you much more of a headache.
26. OliverJones Newbie Joined: Jul 2012 Milton Keynes Posts: 16 Peugeot 106 1.6 8v Petrol Automatic

    #26 8th July 2012, 01:02

    pull the key apart, remove the little rfid transponder chip, then glue it on the otherside of the ignition barrel plastic, (as close to the arial as possible)
27. sam123amy Newbie Joined: Oct 2013 Posts: 2

    #27 18th October 2013, 00:28

    Quote:

    Originally Posted by OliverJones pull the key apart, remove the little rfid transponder chip, then glue it on the otherside of the ignition barrel plastic, (as close to the arial as possible)

    does it work if so how did u open up the key
28. sam123amy Newbie Joined: Oct 2013 Posts: 2

    #28 18th October 2013, 00:31

    my main key with transponder chip dont turn in ignition but my key that opens boot lock does an the other key with chip opens the doors any idea
29. Joemarni Newbie Joined: Jun 2017 Manchester glossop Posts: 3 Had fair few best was a subaru still blob eye 1998

    #29 27th August 2017, 21:07

    Behind do passenger fuse box mate and does no one no how to disable the ducking thing or what can u not do the old short circuit to the wires or out
30. S1-16v Newbie Joined: Sep 2017 Posts: 2

    #30 26th September 2017, 17:43

    I just done the full swap in my s1 and mine started up with the key fob but now the immobiliser light has come on and it won't fire up . I know it's locked or the signal from fob isn't strong enough but can any one tell me the fix ? Do I just get it unlocked and that's that or is there a way that's abit more easy ? Can I pull the immobiliser box with just ignition ?