No fault codes, just not dispatching. They will take car calls with service tool. Nether car is shut down. Ring communication LED on car 2 stops flashing. Its not hanger track dust (Otis bump)or PI's would be flashing indicating the lock not made. I haven't spent anytime yet to figure it out. I was just hoping someone my of had this issue, and could help. I be there Monday to dig into it further