C70 immobilizer issue

I had a similar problem with my C70. Does the security light blink or stay on? Could be a key signal problem. Have you tried your spare key?

Security light is behaving normally. I tried the spare key; same issue. Could it really be the key programming?

In my case, the key programming was indeed the problem. It's worth having it checked out at a workshop. They can read the key and car's computer to confirm. Better than chasing other potential issues.

Thanks for the advice. Workshop confirmed it was a key programming fault; cost 45€ to resolve.