Car Imobaliser

[Tonyc5]

Hello can someone help plesasethis morning i had to change my headlampl bulb and the only way i could do it was to remove the battary, i have now replace the battary and the car wont start, on the dash there is a light on with a key symble and this wont go off.

any advice will be most helpfull thankyou

[Johndouglas]

Did you follow the correct procedure before disconnecting the battery?   If you do a search for "BSI reset" you'll find it.

[paul.h]

What year C5 is it since I cannot find any key symbols on the dash in the books I have for the 2001 to 2008 C5 ? Where exactly on the dash is the key symbol and is there also a warning meassage ? The nearest I can find that looks like a key is a high temperature symbol.

 

You could also try the spare key and failing that try a battery disconnection/reconnection and then a bsi reset.

 

There is a pinned post in this technical section on a bsi reset and also a pinned post on common problems which has a procedure for disconnecting and reconnecting the battery.