The other day i was driving my 2004 Audi A4 (1.8T, Quattro) and i had pulled into my work to pick something up, left my car running as i ran inside and left. About a mile down the road my car started to lose power so i pulled into a nearby parking lot, where my car continued to completely die. I then tried to restart it and it would turn over but only idle for 2 or so seconds before dieing. I then decided to take it home and run some diagnostic tests to see if i could pull some codes (CEL light was on.)

The codes i got were:

19497
16430
16501
17928

I believe one of these may be an immobiliser message.

Also, after trying to start it a few times it no longer will start.

Has anyone had any issues similar to this?

Thanks,