Hi there,
I have not used my '98 S40 for about a week over Xmas. When I went to start it today the remote locking didn't work. My first thought was that the battery in the remote was gone, so I tried my spare (which was also working a few weeks ago) and that didn't work either.
I can open the car with the key, but the remote operates the immobilizer so I can't start it.
Do you know what could be the cause of this, and how I can fix it? Could it be the battery? How can I over-ride the immobilizer?
Thanks in advance!

 

If you unlock the car with the key that should bypass the alarm. Is the car battery dead?

 

It is more than likely your battery as you have left it idle for a while and assuming it was cold aswell. Get a check done on the battery and if it reads ok then it will be your fuse or relay that is buggered for the immobiliser!!!