Hi, I'm new to the site and was wondering if anyone had some advise on my problem. I have a 2006 Volvo S40 T5 I am rebuilding for my son. It had been starting up fine, but yesterday after having the battery out of it again and unhooking the ECM to work on the front of the engine it is showing the Immobilization code and will not start. Any ideas as to what the problem might be? Any help would be greatly appreciated!!

 

Post this in the S40 section, you'll get faster responses there.