Broken Immobiliser?

I have a nissan primera and my immobiliser has locked itself on and i am not able to turn it of. I have changed the batteries on the key fob and chased all the wires and all are earthed connected and i have no frays. I am not able to read all of the product code as some of it has been scratched of with time is there any way i can turn the immobiliser of or by pass it at all